Identification and structural elucidation of a new sildenafil analogue, dithiopropylcarbodenafil, from a premixed powder intended as a dietary supplement.

•A new sildenafil analogue, dithiopropylcarbodenafil, was detected from premixed powder intended as a dietary supplement.•The structure of the unknown compound was characterized by LC-Q-TOF/MS, NMR and IR spectroscopy.•The comparison of its structure with that of dithiodesmethylcarbodenafil, revealed that the N-methyl group on the piperazine.