ethyl 2-[3-[16-[3,5-bis[16-[3,5-bis(2-ethoxy-2-oxoethoxy)benzoyl]-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7-carbonyl]benzoyl]-1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-7-carbonyl]-5-(2-ethoxy-2-oxoethoxy)phenoxy]acetate 在
sodium hydroxide 作用下,
以
甲醇 、
水 为溶剂,
以47%的产率得到[3-(16-{3,5-Bis-[16-(3,5-bis-carboxymethoxy-benzoyl)-1,4,10,13-tetraoxa-7,16-diaza-cyclooctadecane-7-carbonyl]-benzoyl}-1,4,10,13-tetraoxa-7,16-diaza-cyclooctadecane-7-carbonyl)-5-carboxymethoxy-phenoxy]-acetic acid