Nine herbal dietary supplements intended to be beverages for enhancing sexual performance were analyzed before their possible launch on the market. Four of them contained a sildenafil analog reported for
the first time as an adulterant. After isolation and characterization using NMR, MS, IR and UV, this analog
was named propoxyphenyl-thiohydroxyhomosildenafil as the ethoxy chain on the phenyl ring of the
already known analog thiohydroxyhomosildenafil was replaced by a propoxy moiety. One formulation
was tainted with thiosildenafil, another unapproved PDE-5 inhibitor. Sildenafil along with the natural
alkaloid tetrahydropalmatine that has no documented effect for enhancing erectile dysfunction were
identified in two formulations. Another formulation was adulterated with phentolamine, a drug that is
not approved for boosting male sexual performance when taken orally. The last formulation containing
osthole, a bioactive natural coumarine improving sexual dysfunction, is most probably truly natural.
Nine herbal dietary supplements intended to be beverages for enhancing sexual performance were analyzed before their possible launch on the market. Four of them contained a sildenafil analog reported forthe first time as an adulterant. After isolation and characterization using NMR, MS, IR and UV, this analogwas named propoxyphenyl-thiohydroxyhomosildenafil as the ethoxy chain on the phenyl ring of thealready known analog thiohydroxyhomosildenafil was replaced by a propoxy moiety. One formulationwas tainted with thiosildenafil, another unapproved PDE-5 inhibitor. Sildenafil along with the naturalalkaloid tetrahydropalmatine that has no documented effect for enhancing erectile dysfunction wereidentified in two formulations. Another formulation was adulterated with phentolamine, a drug that isnot approved for boosting male sexual performance when taken orally. The last formulation containingosthole, a bioactive natural coumarine improving sexual dysfunction, is most probably truly natural.
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