(1,3,3-Trimethylindolin-2-ylidene)acetaldehyde .DELTA.2,.alpha.-Indolineacetaldehyde, 1,3,3-trimethyl- 1,3,3-Trimethyl-.DELTA.2,.alpha.-indolineacetaldehyde 1,3,3-Trimethyl-2-(formylmethylene)indoline 2-(Formylmethylene)-1,3,3-trimethylindoline 84-83-3 Acetaldehyde, (1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)- Fischer's aldehyde Fisher's aldehyde NSC68048