Journal
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
Volume 59, Issue -, Pages 58-66Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpba.2011.10.001
Keywords
Dietary supplement; Adulterants; Depiperazinothiosildenafil; NMR; MS
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iErect, a new dietary supplement marketed as 100% natural and sold over the Internet, was analyzed. It contains thiosildenafil, a sildenafil analogue already reported as an adulterant in herbal formulations, and a new compound whose structure was elucidated after isolation using NMR, MS and IR. It was named depiperazinothiosildenafil as it results from the hydrolytic cleavage of the S-N bond of the sulfonamide group of thiosildenafil. A capsule of iErect contains a very high amount (approximate to 220 mg) of thiosildenafil and mg of depiperazinothiosildenafil, which places consumers at risk for potentially serious side-effects. (C) 2011 Elsevier B.V. All rights reserved.
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