The invention provides for compounds that are phosphodiesterase inhibitors. The invention further provides for a method for screening compounds that bind to and modulate a phosphosdiesterase protein. The invention also provides methods for treating conditions associated with accumulated amyloid-beta peptide deposit accumulations by administering a phosphodiesterase-binding compound to a subject.
A method of obtaining information about a chemically active area of a target molecule, for example for drug discovery, comprising:
providing a set of substantially rigid chemical gauges;
reacting said target with a plurality of gauges of said set of gauges;
assaying a binding of said gauges with said target to obtain a plurality of assay results; and
analyzing said assay results to obtain information about said chemically active area.
The present invention relates to derivatives of tadalafil, substituted with deuterium on the methylene carbon atom situated between the oxygens of the benzodioxol ring, and optionally further substituted with deuterium atoms in place of normally abundant hydrogen, and 13C in place of normally abundant 12C. These compounds are selective PDE5 inhibitors and possess advantageous biopharmaceutical and pharmacokinetic properties. The invention further provides compositions comprising these compounds and methods of treating diseases and conditions that are responsive to PDE5 inhibition, alone and in combination with additional agents.