The molecule is a homodetic cyclic peptide isolated from a marine sponge Phakellia sp. It exhibits cytotoxic activity against murine P388 lymphocytic leukemia cells and moderate cancer cell growth inhibitory activity against a panel of human cancer cells. It has a role as a metabolite. It is a homodetic cyclic peptide, a sulfoxide, a carboxylic ester and a macrocycle.
methyl 2-[(3S,6S,9S,12S,15S,18S,21S)-18-benzyl-3-[(2S)-butan-2-yl]-6,12-dimethyl-9-(2-methylsulfinylethyl)-2,5,8,11,14,17,20-heptaoxo-1,4,7,10,13,16,19-heptazabicyclo[19.3.0]tetracosan-15-yl]acetate