Photoresist Chemicals Benzoic acid, 3-[[5-phenyl-3-(2-pyridinyl)-1-(tetrahydro-1,1-dioxido-3-thienyl)-1H-pyraz ol-4-yl]methyl]-, 1,1-dimethylethyl ester Cas：919095-55-9 Molecular Formula：C30H31N3O4S