Structure of 214147-48-5
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CAS No. : | 214147-48-5 |
Formula : | C7H15ClN2O |
M.W : | 178.66 |
SMILES Code : | CC(N1CCC(N)CC1)=O.[H]Cl |
MDL No. : | MFCD08690151 |
InChI Key : | AWKOGAFRLOPNOP-UHFFFAOYSA-N |
Pubchem ID : | 17221642 |
GHS Pictogram: |
![]() |
Signal Word: | Warning |
Hazard Statements: | H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
Num. heavy atoms | 11 |
Num. arom. heavy atoms | 0 |
Fraction Csp3 | 0.86 |
Num. rotatable bonds | 1 |
Num. H-bond acceptors | 2.0 |
Num. H-bond donors | 1.0 |
Molar Refractivity | 50.33 |
TPSA ? Topological Polar Surface Area: Calculated from |
46.33 Ų |
Log Po/w (iLOGP)? iLOGP: in-house physics-based method implemented from |
0.0 |
Log Po/w (XLOGP3)? XLOGP3: Atomistic and knowledge-based method calculated by |
0.14 |
Log Po/w (WLOGP)? WLOGP: Atomistic method implemented from |
0.38 |
Log Po/w (MLOGP)? MLOGP: Topological method implemented from |
0.28 |
Log Po/w (SILICOS-IT)? SILICOS-IT: Hybrid fragmental/topological method calculated by |
0.07 |
Consensus Log Po/w? Consensus Log Po/w: Average of all five predictions |
0.17 |
Log S (ESOL):? ESOL: Topological method implemented from |
-0.97 |
Solubility | 19.1 mg/ml ; 0.107 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (Ali)? Ali: Topological method implemented from |
-0.67 |
Solubility | 38.2 mg/ml ; 0.214 mol/l |
Class? Solubility class: Log S scale |
Very soluble |
Log S (SILICOS-IT)? SILICOS-IT: Fragmental method calculated by |
-0.33 |
Solubility | 84.3 mg/ml ; 0.472 mol/l |
Class? Solubility class: Log S scale |
Soluble |
GI absorption? Gatrointestinal absorption: according to the white of the BOILED-Egg |
High |
BBB permeant? BBB permeation: according to the yolk of the BOILED-Egg |
No |
P-gp substrate? P-glycoprotein substrate: SVM model built on 1033 molecules (training set) |
No |
CYP1A2 inhibitor? Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set) |
No |
CYP2C19 inhibitor? Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set) |
No |
CYP2C9 inhibitor? Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set) |
No |
CYP2D6 inhibitor? Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set) |
No |
CYP3A4 inhibitor? Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set) |
No |
Log Kp (skin permeation)? Skin permeation: QSPR model implemented from |
-7.29 cm/s |
Lipinski? Lipinski (Pfizer) filter: implemented from |
0.0 |
Ghose? Ghose filter: implemented from |
None |
Veber? Veber (GSK) filter: implemented from |
0.0 |
Egan? Egan (Pharmacia) filter: implemented from |
0.0 |
Muegge? Muegge (Bayer) filter: implemented from |
1.0 |
Bioavailability Score? Abbott Bioavailability Score: Probability of F > 10% in rat |
0.55 |
PAINS? Pan Assay Interference Structures: implemented from |
0.0 alert |
Brenk? Structural Alert: implemented from |
0.0 alert: heavy_metal |
Leadlikeness? Leadlikeness: implemented from |
No; 1 violation:MW<1.0 |
Synthetic accessibility? Synthetic accessibility score: from 1 (very easy) to 10 (very difficult) |
1.2 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A solution of Intermediate 22 (0. [03G,] ca. 0.1 mmol) in ethanol [(LML)] was treated with triethylamine (0. [07ML,] 0.5 mmol), followed by a 0. 1M ethanolic solution of Intermediate 6 [(L.] [LML OF THE] solution [= 0.] 11 mmol). The mixture was heated at reflux [(80C)] for 18h. A further portion of Intermediate 6 [(0.] [OLML,] undiluted) was then added and heating continued for a further 24h. Volatiles were removed in vacuo and the residue dissolved in DCM, then applied to an SPE cartridge (aminopropyl, [I G) WHICH] was eluted first with DCM, then with methanol. The DCM fraction was concentrated in vacuo, then applied to an SPE cartridge (silica, [0.] 5g) eluting with [(I)] DCM, (ii) EtOAc and (iii) a stepwise gradient of chloroform: methanol (from 99: 1 up to 4: 1). Fractions containing desired material were combined to afford Example 57 (0. 003g). LCMS showed MH+ = 422; [TRET] = 2. 1min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A solution of Intermediate [28] (0. [03G,] 0.1 mmol) in ethanol [(LML)] was treated with a [0.] 1M ethanolic solution of Intermediate 6 [(L.] lml of solution [= 0.] 11 mmol). Triethylamine (0. [07ML,] 0.5 mmol) was then added and the mixture heated at reflux [(85C),] under nitrogen for 12h. A further portion of Intermediate 6 (0.1 mmol) was then added and heating continued for a further 36h. The mixtures were concentrated in vacuo and the residue treated with chloroform. A small amount of insoluble material was collected by filtration, then the filtrate applied to an SPE cartridge (aminopropyl, [1 G)] which was eluted first with DCM, then with methanol. Fractions containing desired material were combined and concentrated in vacuo. The residue was further purified by SPE (silica, [0.] 5g) eluting with (i) DCM, (ii) chloroform, (iii) EtOAc and (iv) a stepwise gradient of chloroform: methanol (from 99: 1 up to 4: 1). Fractions containing desired material were combined to afford Example 74 (0.029g). LCMS showed MH+ = 407; TRET = 2.57 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-ethyl-N,N-diisopropylamine; In acetonitrile; at 85℃; for 34h; | Intermediate 1 (2.58g), Intermediate 6 (2. [0G)] and N, N-diisopropylethylamine (8. [9ML)] were dissolved in acetonitrile (98ml). The reaction mixture was heated at [85 C] for 24h then an additional portion of Intermediate 6 (0. [18G)] was added and heating continued for a further [L OH.] The reaction was concentrated in vacuo and the residues partitioned between DCM and water. The phases were separated and the organic phase evaporated in vacuo. The residue was purified by chromatography using Biotage (silica 90g) eluting with DCM: MeOH (5%) to afford Example 207 [(1.] 55g) as a white solid. LCMS showed MH+ 360; TROT= 2.71 min. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With hydrogenchloride; triethylamine; In 1,4-dioxane; methanol; dichloromethane; chloroform; | EXAMPLE 9 To a solution of O-phenyl N-(4-pyridyl)carbamate (0.81 g) in chloroform (10 ml) were added <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (0.68 g) and triethylamine (1.06 ml) at ambient temperature. After stirring for 1 day, the mixture changed to a solution. The solvents were removed under reduced pressure. A residue was purified by column chromatography (silica gel 100 ml, dichloromethane:methanol=10:1 to 5:1, and silica gel 50 ml, dichloromethane:methanol:aqueous ammonia=10:1:0.1). The solvents of desired fractions were removed under reduced pressure. A residue was dissolved with methanol (5 ml) and dichloromethane (5 ml), and 4N hydrogen chloride in dioxane (1.5 ml) was added to the solution. The solvents were removed under reduced pressure, and the residue was evaporated azeotropically with methanol. After crystallization from diisopropyl ether and n-hexane, N-(1-acetylpiperidin-4-yl)-N'-(4-pyridyl)urea (343 mg) was obtained. NMR (DMSO-d6, delta): 1.1-1.6 (2H, m), 1.77 (2H, m), 2.01 (3H, s), 2.94 (1H, br t, J=10.4 Hz), 3.22 (1H, br t, J=10.1 Hz), 3.76 (2H, m), 4.05 (1H, d, J=13.6 Hz), 7.60 (1H, d, J=7.8 Hz), 7.83 (2H, d, J=6.8 Hz), 8.52 (2H, d, J=7.1 Hz), 11.21 (1H, s), 14.66 (1H, br s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-ethyl-N,N-diisopropylamine; In dichloromethane; | EXAMPLE 6 To a suspension of <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (715 mg) in dichloromethane (7 ml) were added diisopropylethylamine (1.83 ml) and a solution of 4-fluorobenzoyl chloride (0.83 mg) in dichloromethane (2 ml) at ambient temperature. After stirring for 6.5 hours, the reaction mixture was diluted with dichloromethane and washed with water, saturated aqueous sodium hydrogen carbonate, and brine. After drying with magnesium sulfate, the solvents were removed under reduced pressure. A residue was purified by column chromatography (silica gel 50 ml, dichloromethane:methanol=50:1 to 10:1). After rinse with diisopropyl ether, N-(1-acetylpiperidin-4-yl)-4-fluorobenzamide (738 mg) was obtained. NMR (DMSO-d6, delta): 1.40 (2H, m), 1.81 (2H, distorted t, J=12.4 Hz), 2.01 (3H, s), 2.68 (1H, br t, J=11.4 Hz), 3.13 (1H, br t, J=11.6 Hz), 3.83 (1H, br t, J=13.9 Hz), 4.01 (1H, m), 4.33 (1H, br d, J=13.7 Hz), 7.29 (2H, t, J=8.9 Hz), 7.92 (2H, dd, J=5.5, 8.8 Hz), 8.31 (1H, d, J=7.7 Hz) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-ethyl-N,N-diisopropylamine; In dichloromethane; | EXAMPLE 10 To a suspension of <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (536 mg) in dichloromethane (5 ml) were added 4-fluorophenyl isocyanate (375 mul) and diisopropylethylamine (575 mul) at ambient temperature. After stirring for 3 hours, the reaction mixture was diluted with dichloromethane. An organic phase was separated and an aqueous phase was extracted with dichloromethane. A combined organic phase was dried over magnesium sulfate and the solvents were removed under reduced pressure. After crystallization from diisopropyl ether and n-hexane, N-(1-acetylpiperidin-4-yl)-N'-(4-fluorophenyl)urea (448 mg) was obtained. NMR (DMSO-d6, delta): 1.1-1.5 (2H, m), 1.80 (2H, distorted t, J=10 Hz), 2.00 (3H, s), 2.77 (1H, br d, J=10.8 Hz), 3.14 (1H, br d, J=11.1 Hz), 3.5-3.9 (2H, m), 4.16 (1H, br d, J=13.2 Hz), 6.15 (1H, d, J=7.6 Hz), 7.05 (2H, t, J=8.9 Hz), 7.40 (2H, dd, J=5.0, 9.2 Hz), 8.37 (1H, s) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In pyridine; hydrogenchloride; dichloromethane; water; ethyl acetate; | EXAMPLE 5 To a suspension of <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (0.4 g) in dichloromethane (5 ml) were added in turn pyridine (0.54 ml) and 4-fluorophenyl chloroformate (0.29 ml) at 0 C. The mixture was allowed to warm to ambient temperature and stirred for 1 hour, which was taken up into a mixture of water and ethyl acetate. The separated organic layer was washed in turn with hydrochloric acid (1N), aqueous sodium hydrogen carbonate, and brine, and dried over magnesium sulfate. Evaporation under reduced pressure gave a residue, which was triturated with diisopropyl ether to give 1-acetyl-4-(4-fluorophenoxycarbonylamino)piperidine (347 mg). NMR (DMSO-d6, delta): 1.15-1.55 (2H, m), 1.7-1.95 (2H, m), 2.00 (3H, s), 2.65-2.85 (1H, m), 3.0-3.25 (1H, m), 3.5-3.7 (1H, m), 3.7-3.9 (1H, m), 4.15-4.3 (1H, m), 7.05-7.3 (4H, m), 7.86 (1H, d, J=8 Hz) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-ethyl-N,N-diisopropylamine; In dichloromethane; | EXAMPLE 8 To a suspension of <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (715 mg) in dichloromethane (7 ml) were added diisopropylethylamine (1.83 ml) and a solution of 4-fluorobenzenesulfonyl chloride (0.83 mg) in dichloromethane (2 ml) at ambient temperature. After stirring for 6.5 hours, the reaction mixture was diluted with dichloromethane and washed with water, saturated aqueous sodium hydrogen carbonate, and brine. After drying with magnesium sulfate, the solvents were removed under reduced pressure. A residue was purified by column chromatography (silica gel 50 ml, dichloromethane:methanol=50:1 to 20:1). After rinse with diisopropyl ether, N-(1-acetylpiperidin-4-yl)-4-fluorobenzenesulfonamide (859 mg) was obtained. NMR (DMSO-d6, delta): 1.21 (2H, m), 1.54 (2H, m), 1.94 (3H, s), 2.66 (1H, br t, J=10.8 Hz), 3.02 (1H, dt, J=2.9, 12.0 Hz), 3.22 (1H, m), 3.64 (1H, br d, J=14.0 Hz), 4.05 (1H, br d, J=13.2 Hz), 7.44 (2H, t, J=8.9 Hz), 7.8-8.0 (3H, m) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With potassium carbonate; In N,N-dimethyl-formamide; at 20℃; for 48h; | A mixture of aryl halide intermediate VII.2 (10.5 g; 41.9 mmol), the amine <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (7.48 g; 41.9 mmol), potassium carbonate (20.3 g; 147 mmol) and DMF (60 ml) is stirred at r.t. for 2 days. The mixture is diluted with water and extracted with DCM. The organic layer is separated, dried and evaporated. The residue is purified by silica gel chromatography (cyclohexane/ethyl acetate 70:30->20:80) to yield the title compound. [0171] C17H23N3O6 ESI Mass spectrum: m/z=366 [M+H]+ | |
With potassium carbonate; In N,N-dimethyl-formamide; at 20℃; for 48h; | Intermediate IV.1 A mixture of aryl halide intermediate VII.2 (10.5 g; 41.9 mmol), the amine 1 -acetyl-4- aminopiperidine hydrochloride (7.48 g; 41 .9 mmol), potassium carbonate (20.3 g; 147 mmol) and DMF (60 ml) is stirred at r.t. for 2 days. The mixture is diluted with water and extracted with DCM. The organic layer is separated, dried and evaporated. The residue is purified by silica gel chromatography (cyclohexane / ethyl acetate 70:30 -> 20:80) to yield the title compound. C17H23N3O6 ESI Mass spectrum: m/z = 366 [M+H]+ |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
> 95% | With hydrogenchloride; In 1,4-dioxane; at 0 - 20℃; | A solution of iert-butyl (1-acetylpiperidin-4-yl)carbamate I7 (10.72 g, 44.24 mmol) in 1 ,4- dioxane (100 mL) was cooled to 0 C and treated with 4.0 M HCI in 1 ,4-dioxane (12.2 mL, 48.7 mmol). A white precipitate formed following addition of the acid which was isolated by filtration. The precipitate was dissolved in MeOH (100 mL) and treated with 4.0 M HCI in 1 ,4- dioxane (12.2 mL, 48.7 mmol) and the mixture was stirred at room temperature for 16 hours. Another aliquot of 4.0 M HCI in 1 ,4-dioxane (6.10 mL, 24.4 mmol) was added and the reaction mixture was stirred for 1 .5 hours at 40 C. The volatiles were removed in vacuo and the white solid was dried under high vacuum to give the title compound (8.60 g, -90% purity, >95% yield). 1H NMR (400 MHz, d6-DMSO) delta 8.52 - 8.23 (m, 3H), 4.39 - 4.26 (m, 1 H), 3.89 - 3.77 (m, 1 H), 3.28 - 3.14 (m, 1 H), 3.1 1 - 3.00 (m, 1 H), 2.65 - 2.54 (m, 1 H), 1.99 (s, 3H), 1.97 - 1.86 (m, 2H), 1.54 - 1.41 (m, 1 H), 1.41 - 1.27 (m, 1 H). |
89% | With hydrogenchloride; In methanol; ethyl acetate; at 20℃; | To a solution of ie -butyl (1 -acetylpiperidin-4-yl)carbamate I43 (2.5 g, 10 mmol) in MeOH (10 mL) was added HCI/EtOAc (2 M, 10 mL). The mixture was stirred at room temperature overnight. The solvent was removed to give the desired compound (1.6 g, 89% yield) as a white solid. LCMS-C: RT 0.25 min; m/z 143.1 [M+H] ' (free base) |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With N-ethyl-N,N-diisopropylamine; In isopropyl alcohol; at 100℃;Sealed tube; | To a solution of 1-(4-aminopiperidin-1 -yl)ethanone hydrochloride I44 (1 .0 g, 5.6 mmol) in /- PrOH (10 mL) were added DIPEA (2.17 g, 16.8 mmol) and 4,6-dichloropyrimidine (0.83 g, 5.6 mmol). The resulting mixture was stirred at 100 C in a sealed tube overnight. The solvent was removed under reduced pressure, the residue was diluted with water (50 mL) and the pH adjusted to 12 by addition of 1 M NaOH. The aqueous layer was extracted with DCM (4 50 mL), the combined organic layers were washed with brine (100 mL), dried over a2SC>4 and concentrated. The residue was purified by column chromatography (100% (0705) EtOAc) to give the desired compound (1 .3 g, 92% yield) as a yellow oil. 1H NMR (400 MHz, d4-MeOD) delta 8.24 (s, 1 H), 6.50 (s, 1 H), 4.44-4.41 (m, 1 H), 4.17 (m, 1 H), 3.94-3.90 (m, 1 H), 3.28-3.20 (m, 1 H), 2.91 -2.84 (m, 1 H), 2.12-2.05 (m, 5H), 1 .52 - 1.40 (m, 2H). LCMS-C: RT 0.73 min; m/z 255.1 [M+H]' |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
24% | A mixture of 1 -(4-aminopiperidin-1 -yl)ethan-1 -one hydrochloride I8 (2.25 g, 12.6 mmol), methyl 2-bromoisonicotinate I9 (1 .81 g, 8.38 mmol), Cs2C03 (10.92 g, 33.51 mmol), xantphos (0.242 g, 0.419 mmol) and Pd2(dba)3 (0.384 g, 0.419 mmol) in 1.4-dioxane (40 mL) was bubbled with nitrogen for 10 min. The mixture was then stirred under an atmosphere of nitrogen at 80 C for 24 hours. Further Cs2C03 (5.46 g, 16.8 mmol), xantphos (0.121 g, 0.209 mmol) and Pd2(dba)3 (0.192 g, 0.210 mmol) were added and the mixture was stirred under an atmosphere of nitrogen at 80 C for 5 days. The reaction mixture was returned to room temperature and diluted with EtOAc (-150 mL). Solid impurities were removed by filtration and the filtrate solvent was removed in vacuo. The resultant solid was purified by column chromatography (Biotage Isolera, 40 g Si02 cartridge, 0-100% EtOAc in petroleum benzine 40-60 C, then 0-20% MeOH (containing 1 % v/v TEA) in EtOAc) to give the title compound as a yellow solid (0.558 g, 24%). LCMS-B: rt 3.05 min; m/z 278.2 [M+H |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
10.4% | With dicyclohexyl-(2?,4?,6?-triisopropyl-3,6-dimethoxy-[1,1?-biphenyl]-2-yl)phosphine; C47H64ClNO2PPd*C5H12O; sodium t-butanolate; In 1,4-dioxane; at 120℃; for 1h;Sealed tube; | The sealed tube is charged with 7-bromo-5-chloroquinoxaline (50 mg; 0.21 mmol; 1.00 eq.), 1 -(4-aminopiperidin-1 -yl)ethan-1-one hydrochloride (38 mg; 0.27 mmol; 1.30 eq.), NaOtBu (59 mg; 0.62 mmol; 3.00 eqf.), BrettPhos Pd G1 (3.3 mg; 0.00 mmol; 0.02 eq.), BrettPhos (4.4 mg; 0.01 mmol; 0.04 eq.) and sealed with silicone PTFE coated cap. The air from the vessel is evacuated in vacuo thorough syringe and backfilled with argon. The cycle is repeated 3 times and anhydrous [1 ,4]-dioxane (1 .00 ml) is added thorough syringe. RM is heated and stirred for 1 h at 120C. Then RM is diluted with EtOAc and filtered through celite pad. Filtrate is evaporated resulted oily residue is purified by FCC (MeOH/DCM, gradient). 1-{4-[(8-Chloroquinoxalin- 6-yl)amino]piperidin-1-yl}ethan-1 -one (6.9 mg; 0.02 mmol; yield 10.4%;94% by UPLC) is obtained as brown glass. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
33 mg | With triethylamine; In dichloromethane; at 20℃;Inert atmosphere; | To the solution of diamantane-4-isocyanate (27) (105 mg, 0.46 mmol) in DCM (1 mL) from the previous step is added <strong>[214147-48-5]1-acetyl-4-aminopiperidine hydrochloride</strong> (22·HCl) (98 mg, 0.55 mmol) and DCM (1 mL), followed by Et3N. The mixture was stirred at room temperature overnight. DCM was added to the mixture and it was washed with 2 NHCl (30 mL). The organics were dried over anh. Na2SO4, filtered and evaporated to obtain a residue (48 mg). Column chromatography(Dichloromethane/Methanol mixture) gave the desired urea (28) (33 mg, 21% overall yield) as a beige solid, mp 195-196 C. IR (ATR): nu:3364, 2906, 2881, 2847, 1686, 1601, 1550, 1480, 1462, 1444, 1429,1374, 1348, 1322, 1305, 1267, 1221, 1138, 1105, 1048, 1002, 986,976, 918, 613, 597, 576 cm-1. 1H NMR (400 MHz, CDCl3) delta: 1.19(complex signal, 2H, 3-Hax and 5-Hax), 1.69-1.78 (complex signal, 10H,diamantane-H), 1.83-1.94 (complex signal, 11H, 3-Heq, 5-Heq, 9 diamantane-H), 2.08 (s, 3H, COCH3), 2.73 (dt, J=11.6 Hz, J?=3.2 Hz, 1H, 2-Hax or 6-Hax), 3.13 (dt, J=11.6 Hz, J?=3.2 Hz, 2H, 6-Hax or 2-Hax), 3.71-3.85 (complex signal, 2H, 4-H and 6-Heq or 2-Heq), 4.36(broad s, NH, urea), 4.42-4.50 (complex signal, 2H, 2-Heq or 6-Heq andNH). 13C NMR (100.6 MHz, CDCl3) delta: 21.4 (CH3, COCH3), 25.6 (CH, C9?), 32.4 (CH2, C3 or C5), 33.6 (CH2, C5 or C3), 36.6 (CH), 37.4 (CH2),38.7 (CH), 40.7 (CH2, C2 or C6), 43.0 (CH2), 45.4 (CH2, C6 or C2), 46.9(CH, C4), 49.8 (C, C4?), 156.6 (C, CO urea), 169.0 (C, COCH3). HRMSESI+m/z [M+H]+ calcd for [C22H33N3O2+H]+: 372.2646, found:372.2657. |
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