L-AP3 is a potent antagonist of metabotropic glutamate receptor (mGluR), demonstrating inhibitory effects on D-phosphoserine and L-phosphoserine with IC50 values of 368 μM and 2087 μM, respectively.
20-O-Demethyl-AP3 is a secondary metabolite derived from Ansamitocin P-3, and Ansamitocin P-3 is a macrocyclic antitumor antibiotic exerting its therapeutic effects by inhibiting microtubules.