Sildenafil

Chemical Name

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

Chemical Name

5-[2-Ethoxy-5- [(4-methyl-4-oxido-1-piperazinyl)sulfonyl]phenyl]-1-methyl-3-propyl-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-7-one

Chemical Name

1-[[3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1Hpyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy phenyl]sulfonyl]piperazine (Piperazine Desmethylsildenafil)

Chemical Name

1-[[3-(4,7-Dihydroxy-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl] sulfonyl]-4-methyl-piperazine

Chemical Name

N-[[3-(4,7-Dihydro-1-methyl- 7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy phenyl]sulfonyl]-N,N-diethanolamine

Chemical Name

5-[2-Ethoxy-5-[(4-ethyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one (Homosildenafil)

Chemical Name

5-(2-Ethoxyphenyl)-1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one