SDFA6: Sildenafil RC 16

4-Ethoxy-3-(3-isobutyl-1-methyl-7-oxo-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzene-1-sulfonyl chloride ;

CAS # 1467610-68-9 ;

C18H21ClN4O4S ;
Mol. Wt.: 424.9 ;