Photoresist Chemicals TIANFU-CHEM 3-Pyridinecarboxylic acid, 5-cyano-1,4-dihydro-2,6-dimethyl-4-(4-oxo-2-phenyl-4H-1-benzopyran- 8-yl)-, ethyl ester Cas：94420-00-5 Molecular Formula：C26H22N2O4