2-[2-[2-Hexanoylamino-4-(4-hydroxy-phenyl)-butyrylamino]-4-(4-hydroxy-phenyl)-butyrylamino]-3-phenyl-propionic acid D-phenylalanine, N-[(2S)-4-(4-hydroxyphenyl)-2-[[(2R)-4-(4-hydroxyphenyl)-1-oxo-2-[(1-oxohexyl)amino]butyl]amino]-1-oxobutyl]- InChI=1/C35H43N3O7/c1-2-3-5-10-32(41)36-29(21-15-24-11-17-27(39)18-12-24)33(42)37-30(22-16-25-13-19-28(40)20-14-25)34(43)38-31(35(44)45)23-26-8-6-4-7-9-26/h4,6-9,11-14,17-20,29-31,39-40H,2-3,5,10,15-16,21-23H2,1H3,(H,36,41)(H,37,42)(H,38,43)(H,44,45)/t2 Spiroidesin rel-N-[(2R)-2-{[(2S)-2-(hexanoylamino)-4-(4-hydroxyphenyl)butanoyl]amino}-4-(4-hydroxyphenyl)butanoyl]-L-phenylalanine