Photoresist Chemicals 1-Pentanone, 1-[5-[(3R)-3-amino-4-hydroxy-3-methylbutyl]-1-methyl-1H-pyrrol-2-yl]-5-( 4-chlorophenyl)-, monohydrochloride Cas：566936-29-6 Molecular Formula：C21H29ClN2O2.ClH