Photoresist Chemicals 2H-Pyrido[1,2-a]pyrazine-1,8-dione, 2-[(3-chlorophenyl)methyl]-9-hydroxy-7-(1-methyl-1H-imidazol-2-yl)-, monohydrochloride Cas：845720-12-9 Molecular Formula：C19H15ClN4O3.ClH