SDFD3: Sildenafil RC 43

5-(2-Ethoxy-5-(4-methylpiperazin-1-ylsulfonyl)phenyl)-2-methyl-3-propyl-2H-pyrazolo[4,3-d]pyrimidin-7(6H)-one ;

CAS # 253178-46-0 ;

C22H30N6O4S ; 
Mol. Wt.: 474.58 ;