hemiasterlin

Noun

 * 1)  The tripeptide  (E,4S)-4-(2S)-3,3-dimethyl-2-[[(2S)-3-methyl-2-(methylamino)-3-(1-methylindol-3-yl)butanoyl]amino]butanoyl]-methylamino]-2,5-dimethylhex-2-enoic acid  found in some marine [[sponges