Photoresist Chemicals Propanamide, N-[1-butyl-2,3-dihydro-4,6-dimethyl-5-[(methylsulfonyl)amino]-1H-indol-7 -yl]-2,2-dimethyl-, monohydrochloride Cas：647008-79-5 Molecular Formula：C20H33N3O3S.ClH