Isolation and identification of a novel sildenafil analogue adulterant in herbal products.


A novel sildenafil analogue found in herbal products by a routine drug-adulteration screening programme was isolated by column chromatography. On the basis of extensive 1D- and 2D-nuclear magnetic resonance (NMR) spectroscopy and mass spectral analysis, the structure of a new compound YJ-07 was established as 1-[4-ethoxy-3-(6,7-dihydro-1-methyl-7-oxo-3… (More)
DOI: 10.1080/19440049.2016.1272137


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