- 期刊
Isolation and Identification of Three Thio-sildenafil Analogues in Dietary Supplements
並列摘要
Three compounds were found to have been illegally added to dietary supplements marketed for erectile dysfunction. The structures of these compounds were identified with NMR, HRMS, IR, UV and LC/MS/MS, after comparison with the structure of sildenafil, data showed that the oxygen atom of the carbonyl group in the heterocyclic ring had been replaced with a sulfur atom, these thio-sildenafil analogues were identified as thiosildenafil, thiohomosildenafil and hydroxythiohomosildenafil. Since their structures were similar to that of sildenafil, according to structure-activity relationship, the side effects of these analogues might also associate with that of sildenafil. In accordance with this finding, thiosildenafil analogues have been included in the inspection list of illegal adulterants in Taiwan. From January to October 2009, thiosildenafil was detected in 6 samples, thiohomosildenafil was detected in 4 samples and hydroxythiohomosildenafil was detected in 3 samples.
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