LH17

LH17 is a derivative of Kaempferol and serves as a potent and selective inhibitor of PDE4, with PDE4D2 IC50 at 73 nM and PDE4B2 IC50 at 190 nM. It demonstrates over 136-fold selectivity against other PDE isoenzymes (PDE1B/2A/3A/5A/8A/9A/10A) with IC50s greater than 10000 nM, except for PDE7A1 which has an IC50 of 300 nM. LH17 exhibits unique interactions with the M pocket of PDE4. In vitro and in vivo models show that LH17 has significant antifibrotic effects. This compound is applicable in the study of idiopathic pulmonary fibrosis (IPF) .