Deacylmetaplexigenin is a pregnane glycoside isolated from Asclepias incarnate.

HQL-79, a potent, selective and orally active human hematopoietic prostaglandin D synthase (H-PGDS) inhibitor, highly selectively inhibits the synthesis of PGD2, and acts as an anti-allergic agent, with a Kd of 0.8 μM and an IC50 of 6 μM. Shows no obvious effect on COX-1, COX-2, m-PGES, or L-PGDS.

TAT peptide corresponds to the polycationic aa49-57 region of TAT protein. TAT peptide is a cell-penetrating peptide (CPP) used to cargo larger molecules through the lipophilic barrier of the cellular membranes to deliver them inside the cells with intact biological activity.