You can find more information about PF3D7_1209500-PDEa using the following links:

Affecting Drugs
Drug Name	PubMed Articles (year of publication)
Adenosine cyclic 3',5'-monophosphate derivatives	Cyclic AMP and calcium interplay as second messengers in melatonin-dependent regulation of Plasmodium falciparum cell cycle(2005)
E64	Active site similarity between human and Plasmodium falciparum phosphodiesterases: considerations for antimalarial drug design(2011)
Ibmx	PfPDE1, a novel cGMP-specific phosphodiesterase from the human malaria parasite Plasmodium falciparum(2005)
Sildenafil	Active site similarity between human and Plasmodium falciparum phosphodiesterases: considerations for antimalarial drug design(2011)
Tadalafil	Drug to genome to drug: discovery of new antiplasmodial compounds(2011)
Theophylline	PfPDE1, a novel cGMP-specific phosphodiesterase from the human malaria parasite Plasmodium falciparum(2005)
Yanangcorinine	PfPDE1, a novel cGMP-specific phosphodiesterase from the human malaria parasite Plasmodium falciparum(2005)
Zaprinast	PfPDE1, a novel cGMP-specific phosphodiesterase from the human malaria parasite Plasmodium falciparum(2005) Active site similarity between human and Plasmodium falciparum phosphodiesterases: considerations for antimalarial drug design(2011)