5,5'-[Carbonylbis[oxy-2,1-ethanediyl-4,1-piperazinediylsulfonyl(6-ethoxy-3,1-phenylene)]]bis[1,6-dihydro-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one; 4-[[3-(4,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-1-piperazineethanol Carbonate Ester;

Lodenafil carbonate is a new PDE-5 inhibitor used for oral therapy in erectile dysfunction.