Photoresist Chemicals 2-Butenoic acid,3-methyl-,3-(acetyloxy)-2,3,- 3a,4,5,7,9a,9b-octahydro-3,6,9-trimethyl-2,7- dioxoazuleno[4,5-b]furan-4-yl ester Cas：88108-27-4 Molecular Formula：