Chemical Name: 5-(2-Ethoxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-ethyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one
Smiles: CCCC1=NN(CC)C2=C1N=C(C(C=C([S](=O)(N3CCN(C)CC3)=O)C=C4)=C4OCC)NC2=O
Inchi: InChI=1S/C39H40FN3O4/c1-26(2)37-36(39(47)42-31-16-10-5-11-17-31)35(27-12-6-3-7-13-27)38(28-18-20-29(40)21-19-28)43(37)23-22-32(44)24-33(45)25-34(46)41-30-14-8-4-9-15-30/h3-21,26,32-33,44-45H,22-25H2,1-2H3,(H,41,46)(H,42,47)/t32-,33-/m1/s1
Quantification of active pharmaceutical ingredient and impurities in sildenafil citrate obtained from the Internet
Michael A Veronin , Mohammad T Nutan , Uday Krishna Reddy Dodla
Ther Adv Drug Saf. 2014 Oct;5(5):180-9
Validated Methods for Determination of Sildenafil Citrate in The Presence of its Potential Impurities
A.E. El-Gindy , E. Shokry M. Farouk , L. Abd El-Aziz
J Biomed Sci and Res., Vol 2 (4), 2010,262-278
Validated LC method for sildenafil citrate related substances and its potential oxidative degradation product
A.Nageswari, P.Surya Prakash Rao, B.Gowri Sankar Rao, B.Satyanarayana , M.Saravanan , V.Ranga Reddy , Mukkanti
ACAIJ, 10(10) 2011 [683-690]
Determinaton of sildenafil citrate and related substances in the commercial products and tablet dosage form using HPLC
N Daraghmeh, M Al-Omari, A.ABadwan, A.M.YJaber
Journal of Pharmaceutical and Biomedical Analysis Volume 25, Issues 3–4, June 2001, Pages 483-492