macrocycle Val-NMe-D-Phe-Lys-(Cbz)Lys-Leu 、
6-carboxyfluorescein N-hydroxysuccinimide ester 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
以8 mg的产率得到4-[4-[(2S,5S,8S,11S,14R)-14-benzyl-13-methyl-8-(2-methylpropyl)-3,6,9,12,15-pentaoxo-5-[4-(phenylmethoxycarbonylamino)butyl]-11-propan-2-yl-1,4,7,10,13-pentazacyclopentadec-2-yl]butylcarbamoyl]-2-(3-hydroxy-6-oxoxanthen-9-yl)benzoic acid