methyl 14-(2-methoxy-2-oxoethyl)-18-oxo-11-oxa-13-azatetracyclo[8.8.0.02,7.012,17]octadeca-1(10),2,4,6,8,12,14,16-octaene-15-carboxylate 在
sodium hydroxide 作用下,
以
四氢呋喃 为溶剂,
以57.9%的产率得到monosodium mono(9-(carboxylatomethyl)-12-oxo-12H-benzo[5,6]chromeno[2,3-b]pyridine-10-carboxylate)