Theasaponin E2 has antitumor activity.

Pyrimidines are heterocyclic six-membered nitrogen-containing carbon ring structures with uracil cytosine and thymine being the basal structures of ribose-containing nucleosides (uridine cytidine and thymidine respectively) or deoxyribose-containing deoxynucleosides and their corresponding ribonucleotides or deoxyribonucleotides.

5,6-dibromo-1H-indole-3-carboxylic acid is a marine derived natural products found in Smenospongia sp.