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Chemical Structure| 36499-65-7 Chemical Structure| 36499-65-7

Structure of Dicobalt edetate
CAS No.: 36499-65-7

Chemical Structure| 36499-65-7

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Synonyms: Kelocyanor

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Behymer, Matthew M ; Mo, Huaping ; Fujii, Naoaki ; Suresh, Vallabh ; Arzumanian, Ari S ; Chan, Adriano , et al.

Abstract: Cyanide represents a persistent threat for accidental or malicious misuse due to easy conversion into a toxic gas and access to large quantities through several industries. The high safety index of hydroxocobalamin is a cornerstone quality as a cyanide scavenger. Unfortunately, intravenous infusion of hydroxocobalamin limits the utility in a mass casualty setting. We previously reported platinum(II) [Pt(II)] complexes with trans-directing sulfur ligands as an efficacious alternative to hydroxocobalamin when delivered by a bolus intramuscular injection in mice and rabbits. Thus, to enable Pt(II) as an alternative to hydroxocobalamin, a high safety factor is needed. The objective is to maintain efficacy and mitigate the risk for nephrotoxicity. Platinum amino acid complexes with the ability to form five- or six-membered rings and possessing either carboxylates or carboxamides are evaluated in vitro for cyanide scavenging. In vivo efficacy was evaulated in the zebrafish and mice cyanide exposure models. In addition, Pt(II) complex toxicity and pharmacokinetics were evaluated in a cyanide naive Sprague-Dawley model. Doses for toxicity are escalated to 5x from the efficacious dose in mice using a body surface area adjustment. The results show the carboxamide ligands display a time and pH dependence on cyanide scavenging in vitro and efficacy in vivo. Additionally, exchanging the carboxylate for carboxamide showed reduced indications of renal injury. A pharmacokinetic analysis of the larger bidentate complexes displayed rapid absorption by intramuscular administration and having similar plasma exposure. These findings point to the importance of pH and ligand structures for methionine carboxamide complexes with Pt(II).

Keywords: exposures ; countermeasure ; cyanide ; pharmacokinetics ; chemical threat ; safety and efficacy

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Product Details of [ 36499-65-7 ]

CAS No. :36499-65-7
Formula : C10H12Co2N2O8
M.W : 406.08
SMILES Code : [O-]C(CN(CCN(CC([O-])=O)CC([O-])=O)CC([O-])=O)=O.[Co+2].[Co+2]
Synonyms :
Kelocyanor

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