Other name: 5-[2-Ethoxy-5-[2-(4-ethyl-1-piperazinyl)acetyl]phenyl]-1,6-dihydro-1-methyl -3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one;Acetildenafil;Hongdenafil;7H-Pyrazolo[4,3-d]pyriMidin-7-one, 5-[2-ethoxy-5-[2-(4-ethyl-1-piperazinyl)acetyl]phenyl]-1,6-dihydro-1-Methyl-3-propyl- CAS: 831217-01-7 MF C25H34N6O3 MW 466.583