(-)-Gallocatechin Gallate (GCG) is the polyphenol isolated from tea,.

Aconitine is a C19-diterpenoid alkaloid that exerts analgesic effects by activating voltage-gated sodium channels (VGSCs).

Acteoside (Verbascoside) is isolated from Acanthus mollis, acts as an ATP-competitive inhibitor.

Alantolactone is a selective STAT3 inhibitor.

Aloenin is a kind of natural product, has effective clearing and free radical activity, and has moderate inhibitory activity on β-secretion.

Aloin A is a natural anthraquinone glycoside with iron chelating activity.

Aloin B is an active SARS-CoV-2 papain-like protease (PLpro) inhibitor.

Amentoflavone is a potent active GABA(A) negative modulator.

Aristolochic acid is the main component of plant extract Aristolochic acids, which are found in various herbal plants of genus Aristolochia and Asarum.

Aristolactam is an AQP1 inhibitor and Aristolochic acid I metabolite.

Asiatic acid, a pentacyclic triterpene found in Centella asiatica (Centella asiatica).

Asiaticoside, a trisaccaride triterpene from Centella asiatica, suppresses TGF-β/Smad signaling through inducing Smad7 and inhibiting TGF-βRI and TGF-βRII in keloid fibroblasts.

Astilbin is a flavonoid compound and enhances NRF2 activation. Astilbin also suppresses TNF-α expression and NF-κB activation.

Aucubin is an iridoid glycoside component that acn be found in E. ulmoides.

Bavachin, a flavonoid first isolated from seeds of P. corylifolia, acts as a phytoestrogen that activates the estrogen receptors ERα and ERβ.

Bavachinin is agonist of pan-peroxisome proliferator-activated receptor (PPAR).