EC 3.1.4.* (phosphoric diester hydrolase) inhibitor EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor 3',5'-cyclic-GMP 5'-nucleotidohydrolase inhibitor 3',5'-cyclic-GMP 5'-nucleotidohydrolase inhibitors 3',5'-cyclic-GMP phosphodiesterase (EC 3.1.4.35) inhibitor 3',5'-cyclic-GMP phosphodiesterase (EC 3.1.4.35) inhibitors EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitors EC 3.1.4.35 inhibitor EC 3.1.4.35 inhibitors PDE5 inhibitor PDE5 inhibitors cGMP phosphodiesterase inhibitor cGMP phosphodiesterase inhibitors cGMP-PDE inhibitor cGMP-PDE inhibitors cyclic 3',5'-GMP phosphodiesterase inhibitor cyclic 3',5'-GMP phosphodiesterase inhibitors cyclic GMP phosphodiesterase inhibitor cyclic GMP phosphodiesterase inhibitors cyclic guanosine 3',5'-monophosphate phosphodiesterase inhibitor cyclic guanosine 3',5'-monophosphate phosphodiesterase inhibitors cyclic guanosine 3',5'-phosphate phosphodiesterase inhibitor cyclic guanosine 3',5'-phosphate phosphodiesterase inhibitors guanosine cyclic 3',5'-phosphate phosphodiesterase inhibitor guanosine cyclic 3',5'-phosphate phosphodiesterase inhibitors phosphodiesterase 5 inhibitor phosphodiesterase 5 inhibitors phosphodiesterase V inhibitor phosphodiesterase V inhibitors type 5 phosphodiesterase inhibitor type 5 phosphodiesterase inhibitors