Isolation and structural characterization of a new tadalafil analog (chloropropanoylpretadalafil) found in a dietary supplement

The Discovery of Tadalafil:  A Novel and Highly Selective PDE5 Inhibitor. 2: 2,3,6,7,12,12a-hexahydropyrazino[1‘,2‘:1,6]pyrido[3,4-<i>b</i>]indole-1,4-dione Analogues

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Pharmacy, Medicinal Chemistry, Pharmacology +17

Analysis of undeclared synthetic phosphodiesterase-5 inhibitors in dietary supplements and herbal matrices by LC–ESI–MS and LC–UV

Samuel R. Gratz, Cheryl L. Flurer, Karen A. Wolnik · Journal of Pharmaceutical and Biomedical Analysis · 2004 · 176 citations

Pharmacy, Medicinal Chemistry, Pharmacology +12

Strategies for characterizing sildenafil, vardenafil, tadalafil and their analogues in herbal dietary supplements, and detecting counterfeit products containing these drugs

Satya P. Singh, B. L. V. Prasad, Akash A. Savaliya et al. · TrAC Trends in Analytical Chemistry · 2008 · 167 citations

Pharmacy, Pharmacology, Pharmacotherapy +14

Simultaneous determination of synthetic phosphodiesterase-5 inhibitors found in a dietary supplement and pre-mixed bulk powders for dietary supplements using high-performance liquid chromatography with diode array detection and liquid chromatography–electrospray ionization tandem mass spectrometry

Peng Zou, Sharon Sze‐Yin Oh, Peiling Hou et al. · Journal of Chromatography A · 2005 · 148 citations

Natural Sciences, Pharmaceutical Analysis, Pharmacology +16

Simultaneous determination of sildenafil, vardenafil and tadalafil as forbidden components in natural dietary supplements for male sexual potency by high-performance liquid chromatography–electrospray ionization mass spectrometry

Xiaolan Zhu, Song Xiao, Bo Chen et al. · Journal of Chromatography A · 2005 · 128 citations

Medicine, Pharmaceutical Analysis, Pharmacology +15