N-desmethyl Sildenafil (citrate)

N-desmethyl Sildenafil is a major metabolite of sildenafil (Cay-10008671, Cay-14008). N-desmethyl Sildenafil is formed via oxidative metabolism of sildenafil by the cytochrome (CYP) P450 isoforms CYP3A4, CYP3A5, and CYP3A7.Formal Name: 5-[2-ethoxy-5-(1-piperazinylsulfonyl)phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one, 2-hydroxypropane-1,2,3-tricarboxylic acid. Molecular Formula: C21H28N6O4S . C6H8O7. Formula Weight: 652.7. Purity: >98%. Formulation: (Request formulation change), A crystalline solid. Solubility: DMF: 14 mg/ml, DMSO: 10 mg/ml. lambdamax: 212, 295 nm. SMILES: O=S(N1CCNCC1)(C2=CC(C3=NC(C(CCC)=NN4C)=C4C(N3)=O)=C(OCC)C=C2)=O.OC(CC(O)(C(O)=O)CC(O)=O)=O. InChi Code: InChI=1S/C21H28N6O4S.C6H8O7/c1-4-6-16-18-19(26(3)25-16)21(28)24-20(23-18)15-13-14(7-8-17(15)31-5-2)32(29,30)27-11-9-22-10-12-27,7-3(8)1-6(13,5(11)12)2-4(9)10/h7-8,13,22H,4-6,9-12H2,1-3H3,(H,23,24,28),13H,1-2H2,(H,7,8)(H,9,10)(H,11,12). InChi Key: HCOQCFAWFDJJQE-UHFFFAOYSA-N.