英文别名5-(2-Ethoxy-5-((4-ethylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1H-pyrazolo[4,3-d]pyrimidine-7(6H)-thione; 5-[2-ethoxy-5-(4-ethylpiperazin-1-yl)sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[4,3-d]pyrimidine-7-thione; Thiohomosildenafil; 1-[[3-(4,7-Dihydro-1-Methyl-3-propyl-7-thioxo-1H-pyrazolo[4,3-d]pyriMidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-ethyl-piperazine; 5-[2-Ethoxy-5-[(4-ethyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-Methyl-3-propyl-7H-pyrazolo[4,3-d]pyriMidine-7-thione; Sildenafil Impurity 43; 7H-Pyrazolo[4,3-d]pyrimidine-7-thione, 5-[2-ethoxy-5-[(4-ethyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-1-methyl-3-propyl- 
