9-Methoxycamptothecin is a pyranoindolizinoquinoline. 9-Methoxycamptothecin is isolated from Camptotheca acuminata and exhibits anti-tumor activity by inhibiting topoisomerase. 9-Methoxycamptothecin has a potent effect on inducing apoptosis in G2/M phase cells and cancer cells.

Tanshinone I is an inhibitor of type IIA human recombinant sPLA2 (IC50=11 μM) and rabbit recombinant cPLA2 (IC50=82 μM). Tanshinone I possesses hepatocyte protective, anticancer, neuroprotection, and nephroprotective properties. Tanshinone I pretreatment causes significant suppression of skin cell death induces by solar simulated UV and riboflavin-sensitized UVA. Tanshinone I is an abietane diterpenoid. It has a role as an anticoronaviral agent.