Digoxin

Digoxin is a cardiac glycoside and metabolite of digitoxin that binds to and inhibits the Na+/K+-ATPase in cardiac tissues in an ATP- and Mg2+-dependent manner. This inhibition results in loss of the transmembrane Na+ gradient, which decreases activity of the Na+/Ca2+ exchanger, increasing intracellular Ca2+ levels, inotropy, and cardiac force. It increases activity of mitochondrial ATPase and actomyosin ATPase in rat hearts, which is directly correlated with increased myofibrillar contractile strength. In vivo, digoxin also decreases right atrial pressure and increases cardiac output in a canine model of congestive heart failure produced by pulmonary artery constriction. Formulations containing digoxin have been used to treat atrial fibrillation.Formal Name: (3beta,5beta,12beta)-3-[(O-2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1->4)-O-2,6-dideoxy-beta-D-ribo-hexopyranosyl-(1->4)-2,6-dideoxy-beta-D-ribo-hexopyranosyl)oxy]-12,14-dihydroxy-card-20(22)-enolide. CAS Number: 20830-75-5. Synonyms: NSC 95100. Molecular Formula: C41H64O14. Formula Weight: 780.9. Purity: >98%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 30 mg/ml, DMSO: 30 mg/ml. lambdamax: 218 nm. SMILES: C[C@@]12[C@@](CC[C@]3([H])[C@]2([H])C[C@@H](O)[C@@]4(C)[C@]3(O)CC[C@@H]4C(CO5)=CC5=O)([H])C[C@@H](O[C@]6([H])O[C@H](C)[C@@H](O[C@@]7([H])C[C@H](O)[C@H](O[C@]8([H])O[C@H](C)[C@@H](O)[C@@H](O)C8)[C@@H](C)O7)[C@@H](O)C6)CC1. InChi Code: InChI=1S/C41H64O14/c1-19-36(47)28(42)15-34(50-19)54-38-21(3)52-35(17-30(38)44)55-37-20(2)51-33(16-29(37)43)53-24-8-10-39(4)23(13-24)6-7-26-27(39)14-31(45)40(5)25(9-11-41(26,40)48)22-12-32(46)49-18-22/h12,19-21,23-31,33-38,42-45,47-48H,6-11,13-18H2,1-5H3/t19-,20-,21-,23-,24+,25-,26-,27+,28+,29+,30+,31-,33+,34+,35+,36-,37-,38-,39+,40+,41+/m1/s1. InChi Key: LTMHDMANZUZIPE-PUGKRICDSA-N.