Abstract: We disclose substances and a process of developing such substances as potent and selective inhibitors of isoforms of phosphodiesterases of types 1 to 5 (PDE1, PDE2, PDE3, PDE4, PDE5) based on two flavonoids: dioclein, floranol and natural or synthetic analogs thereof. They may be associated with cyclodextrins in inclusion complexes or using a biodegradable or non-biodegradable polymer, such as PLGA, PLA, PGA or mixtures thereof in controlled release devices. Their respective pharmaceutical compositions as well as pharmaceutical and pharmacologically acceptable excipients may be used for the study and treatment of cardiovascular diseases and associated products.