Photoresist Chemicals Methanesulfonamide, N-[3-[5-[2-(2,5-dioxo-1-pyrrolidinyl)ethoxy]-2-pyridinyl]phenyl]-, 2,2,2-trifluoroacetate (1:1) Cas:918147-19-0 Molecular Formula:C18H19N3O5S.C2HF3O2