Corydine is a naturally occurring compound which can be extracted from plants such as Chelidonium majus, Corydalis marschalliana, C. bulbosa, C slivenensis, Glaucium grandiflorum. Corydine has shown some efficacy as an anti-cancer compound in several cell models and was examined along with related compounds from Stephania dinklagei for antiprotozoal activities. (+)- and (-)- Corydine were tested as neuromuscular blocking agents were it was found that there was a modest preference for (+)-corydine.

O-Methyl-Gambogic acid Methyl Ester (aka dimethyl-Gambogic acid) is a derivative of gambogic acid a naturally occurring compound found in the resin excreted by the garcinia hanburryi tree in Southeastern Asia. Dimethyl-Gambogic acid demonstrates antiapoptotic activity in T17 cells with an EC50 of 120 nM. It has also shown efficacy against the parasite Trypanosoma brucei with an IC50 of 1.3 micro-M.