"Phosphodiesterase V Inhibitor"@en . "C2923059" . . "Phosphodiesterase-5 (PDE-5) Inhibitor"@en . "Phosphodiesterase-5 Inhibitor"@en . "PDE-5 Inhibitor"@en . . "Phosphodiesterase 5 Inhibitor"@en . "Phosphodiesterase 5 Inhibitor"@en . . . . .