tetraethyl 3,3',3'',3'''-((3,3'-dimethyl-2,2'-spirobi[chromene]-8,8'-diyl)bis(azanetriyl))tetrapropionate 在
sodium hydroxide 作用下,
以
四氢呋喃 为溶剂,
反应 96.0h,
以92.7%的产率得到3-[[8'-[Bis(2-carboxyethyl)amino]-3,3'-dimethyl-2,2'-spirobi[chromene]-8-yl]-(2-carboxyethyl)amino]propanoic acid