(1-Ethyl-1,3-dihydro-3,3-dimethyl-5-(phenylsulfonyl)-2H-indol-2-ylidene)acetaldehyde (1-Ethyl-1,3-dihydro-3,3-dimethyl-5-(phenylsulphonyl)-2H-indol-2-ylidene)acetaldehyde 55203-66-2 Acetaldehyde, (1-ethyl-1,3-dihydro-3,3-dimethyl-5-(phenylsulfonyl)-2H-indol-2-ylidene)- EINECS 259-531-3