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Single step isolation of sildenafil from commercially available Viagra tablets.
Int J Impot Res. 2003 Oct;15(5):369-72. doi: 10.1038/sj.ijir.3901040.
Int J Impot Res. 2003.
PMID: 14562139
Allosteric sites of phosphodiesterase-5 sequester cyclic GMP.
Kotera J, Francis SH, Grimes KA, Rouse A, Blount MA, Corbin JD.
Kotera J, et al.
Front Biosci. 2004 Jan 1;9:378-86. doi: 10.2741/1231.
Front Biosci. 2004.
PMID: 14766375
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