英文别名DEPIPERAZINOTHIOSILDENAFIL; 4-Ethoxy-3-(1-methyl-3-propyl-7-thioxo-6,7-dihydro-1H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid; 4-ethoxy-3-(1-methyl-3-propyl-7-sulfanylidene-4H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonic acid; Thiosildenafil-despiperazine; Sildenafil Impurity 195 
