O-Desethyl sildenafil is a metabolite of the phosphodiesterase 5 (PDE5) inhibitor sildenafil .1
1.Unceta, N., Echeazarra, L., MontaÑa, M., et al.Validation of an LC-ESI-MS/MS method for the quantitation of phosphodiesterase-5 inhibitors and their main metabolites in rat serum and brain tissue samplesJ. Pharm. Biomed. Anal.70529-533(2012)
















