Photoresist Chemicals 5H-Pyrido[4′,3′:4,5]pyrrolo[2,3-b]pyridine,6-ethyl-6,7,8,9-tetrahydro-4,8-dimethyl-9-phenyl-, hydrochloride (1:1) Cas：5841-28-1 Molecular Formula：C20H23 N3 . Cl H