HQL-79 is a selective and orally active human hematopoietic prostaglandin D synthase (H-PGDS) inhibitor. It inhibits the synthesis of PGD2 and acts as an anti-allergic agent (Kd: 0.8 μM and IC50: 6 μM). It also shows no obvious effect on COX-1, COX-2, m-P
5-hydroxy Diclofenac is a metabolite of the NSAID diclofenac formed by the cytochrome P450 (CYP) isoform CYP3A4. Diclofenac is a non-selectiveCOX inhibitor. It inhibits human COX-1 and -2 with IC50 values of 0.9-2.7 and 1.5-20 μM, respectively. Diclofenac inhibits ovine COX-1 and -2 with IC50 values of 60 and 220 nM, respectively.