Synonyms: Kahalalide A;179733-11-0;AC1L2J08;L-Serine, N-(N-(N-(N-(N-(N-(N-(2-methyl-1-oxobutyl)-D-phenylalanyl)-L-threonyl)-D-leucyl)-D-phenylalanyl)-D-leucyl)-L-threonyl)-, rho-lactone;N-[(2R)-1-[[(3S,6R,9S,12R,15R,18R,19S)-12-benzyl-6-[(1R)-1-hydroxyethyl]-3-(hydroxymethyl)-19-methyl-9,15-bis(2-methylpropyl)-2,5,8,11,14,17-hexaoxo-1-oxa-4,7,10,13,16-pentazacyclononadec-18-yl]amino]-1-oxo-3-phenylpropan-2-yl]-2-methylbutanamide