Photoresist Chemicals Formamide, N-[(3-amino-5-methylpyrazinyl)methyl]-N-[2-[(3,4-dihydroxyphenyl)thio]- 4-hydroxy-1-methyl-1-butenyl]-, monohydrochloride Cas：94168-96-4 Molecular Formula：C18H22N4O4S.ClH