The fruit of Helicteres isora.

Tachyplesin I is a β-hairpin antimicrobial peptide that contains 17 amino acid residues. Tachyplesin I exhibits cytotoxic properties against various human tumor cell lines acting primarily by impairing the integrity of the outer cell membrane.

5β-Hydroxybufotalin (compound 6) is an anticancer agent that can effectively inhibit the growth activity of cancer cells. 5β-Hydroxybufotalin is also a natural product obtained from the chinese traditional drug Ch'an Su.