(2E,4E)-N-[(2S,3R)-3-hydroxy-1-[[(3E,5S,8S,10S)-10-hydroxy-5-methyl-2,7-dioxo-1,6-diazacyclododec-3-en-8-yl]amino]-1-oxobutan-2-yl]-9-methyldeca-2,4-dienamide 、
乙酸酐 生成 [(2S,3E,9S,11S)-11-[[(2S,3R)-3-acetyloxy-2-[[(2E,4E)-9-methyldeca-2,4-dienoyl]amino]butanoyl]amino]-2-methyl-5,12-dioxo-1,6-diazacyclododec-3-en-9-yl] acetate