PD 90780 is a non peptide antagonist of nerve growth factor (NGF). PD 90780 interacts with NGF, prevents NGF binds with p75 NTR. PD 90780 inhibits NGF-p75 NTR interaction with IC50s of 23.1 and 1.8 µM in PC12 cells and PC12 nnr5 cells, respectively .