Photoresist Chemicals 3-Pyridinecarboxylic acid, 5-[2-[5-bromo-2-[(2,4-difluorophenyl)methoxy]phenyl]-1-cyclopenten-1-yl ]-2-(trifluoromethyl)-, ethyl ester Cas:850867-56-0 Molecular Formula:C27H21BrF5NO3