Fmoc-Asn(Trt)-OSu 、 (2,5-dioxopyrrolidin-1-yl) (2S)-2-azidopropanoate 、 (2,5-dioxopyrrolidin-1-yl) (2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)pent-4-enoate 、
Fmoc-L-烯丙基甘氨酸 以11%的产率得到(Z)-(2S,5S,8S,13S)-2-Allyl-13-[(S)-2-((S)-2-tert-butoxycarbonylamino-pent-4-enoylamino)-propionylamino]-3,6,14-trioxo-5-[(trityl-carbamoyl)-methyl]-1,4,7-triaza-cyclotetradec-10-ene-8-carboxylic acid methyl ester