Photoresist Chemicals 3H-Indolium,2-[3-[2-(4-methoxyphenyl)-4H-1-benzothiopyran-4-ylidene]-1-propenyl]-1,3,3-trimethyl-5-nitro-, perchlorate Cas：94663-63-5 Molecular Formula：C30H27N2O3S.ClO4