L-Isoleucine, N-(N-(N-(N2-(N2-(N2-(N-L-alanyl-D-leucyl)-D-arginyl)-erythro-3-hydroxy-L-asparaginyl)-erythro-3-hydroxy-D-asparaginyl)-erythro-beta-hydroxy-L-tyrosyl)-threo-3-hydroxy-L-leucyl)-, lambda-lactone