Cis-Emodin bianthrone (compound 4) is a highly condensed oxygen of emodin anthrone. Cis-Emodin bianthrone stable in acetone solution in air.

Lupeol palmitate is a naturally occurring compound that can be extracted from Ligularia songarica and has antiulcer activity and gastrointestinal protection.

HLM006474 is a pan inhibitor of E2F. This inhibits E2F4 DNA-binding (IC50: 29.8 μM in A375 cells).HLM006474 causes the viability of both SCLC and NSCLC lines (IC50 ranging from 15 to 75 μM). HLM006474 displays little activities against E2F4 DNA-binding in A375 cells at 10 and 20 μM, apparently inhibits E2F4 DNA-binding at 40 μM, and increasingly suppresses the effect at 60 and 80 μM concentrations.