、
方酸二乙酯 在
borate buffer 作用下,
以90%的产率得到1-[(2-iminoethylamido)carbonylpentyl 4,6-dideoxy-4-(3-hydroxy-3-methylbutanamido)-β-D-glucopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->3)-α-L-rhamnopyranosyl-(1->2)-α-L-rhamnopyranoside]-2-ethoxycyclobutene-3,4-dione