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- W1087316982 abstract "A tadalafil analogue was detected for the first time during the screening of a health supplement for undeclared sexual enhancement drugs. The compound had been isolated and purified by preparative high-pressure liquid chromatography (HPLC). Its chemical structure was elucidated using high-resolution mass spectrometry (HRMS), electrospray ionization tandem mass spectrometry (ESI-MS/MS) and nuclear magnetic resonance (NMR) spectroscopy. The compound had a protonated molecular ion at m/z 444 with a chemical formula of C26H25N3O4. The data obtained from the MS analysis of the compound suggested that the N-methyl group on the piperazinedione moiety of tadalafil was substituted with a -C5H9 group. Analysis using NMR was performed and the -C5H9 group was characterized as a cyclopentyl moiety. The analogue was named N-cyclopentyl nortadalafil." @default.
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- W1087316982 date "2016-01-01" @default.
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- W1087316982 title "Isolation and characterization of a tadalafil analogue, N -cyclopentyl nortadalafil in health supplement" @default.
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- W1087316982 doi "https://doi.org/10.1016/j.jpba.2015.08.005" @default.
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