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