Picropodophyllin is a cyclolignan alkaloid found in the mayapple plant family (Podophyllum peltatum), and a small molecule inhibitor of the insulin-like growth factor 1 receptor (IGF1R) with potential antineoplastic activity.

Camphor is a bicyclic monoterpene ketone found widely in plants, especially cinnamomum camphora.

Used as pharmaceutical intermediates.