上游原料
2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)propionic acid7-(1-bromoethyl)-5H-chromeno[2,3-b]pyridine2-(5H-chromeno[2,3-b]pyridin-7-yl)propanal2-(5H-chromeno[2,3-b]pyridin-7-yl)acrylic acid2-chloro-2-(5H-chromeno[2,3-b]pyridin-7-yl)propionic acid2-[4-(1-carboxyethyl)phenoxy]nicotinic acid2-[3-[(2-chloro-3-pyridinyl)carbonyl]-4-hydroxyphenyl]propionic acid2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)propanaldiethyl carbonate; diethylcarbonate2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)propionic acid7-methyl-5H-chromeno[2,3-b]pyridin-5-one7-(bromomethyl)-5H-chromeno[2,3-b]pyridin-5-one2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)acetonitrileethyl 2-cyano-2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)acetateethyl 2-cyano-2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)propanoate2-(5-oxo-5H-chromeno[2,3-b]pyridin-7-yl)propanenitrilediethyl carbonate; diethylcarbonate5H-chromeno[2,3-b]pyridin-5-one5H-chromeno[2,3-b]pyridin-5-ol5H-chromeno[2,3-b]pyridine7-(chloromethyl)-5H-chromeno[2,3-b]pyridine2-(5H-chromeno[2,3-b]pyridin-7-yl)acetonitrileethyl 2-(5H-chromeno[2,3-b]pyridin-7-yl)-2-cyanoacetateethyl 2-(5H-chromeno[2,3-b]pyridin-7-yl)-2-cyanopropanoate
