straight forward :P
Its IUPAC name is 1-[4-ethoxy-3-(6,7-dihydro-1-methyl- 7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin -5-yl)phenylsulfonyl]-4-methylpiperazine !! how do we better know this? ;)
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1 comments:
well,the answer is viagra!
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