期刊
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
卷 56, 期 3, 页码 491-496出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpba.2011.06.004
关键词
Health supplement; Adulterant; MS; NMR
资金
- Health Sciences Authority
A sildenafil analogue was detected and isolated from a health supplement claimed for human use. The structure of this new analogue was elucidated using LC-UV, LC-Orbitrap-MS, IR spectroscopy, 1D and 2D NMR. It was characterized as dithio-desmethylcarbodenafil containing 2 thiocarbonyl groups instead of 2 carbonyl groups, and 4-methyl substitution, on the piperazine ring, rather than 4-ethyl substitution, when compared to sildenafil. (C) 2011 Elsevier B.V. All rights reserved.
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