Photoresist Chemicals 2-Thiophenecarboxylic acid, 4,5-dihydro-4-[1-hydroxy-1-(4-methoxyphenyl)ethyl]-5-[hydroxy(1-methyl- 1H-indol-2-yl)methyl]-, methyl ester Cas：682344-68-9 Molecular Formula：C25H27NO5S