1H-Indole, 2-(((4-ethoxyphenyl)azo)methylene)-2,3-dihydro-1,3,3-trimethyl- 2-(4-Ethoxyphenylazomethylene)-1,3,3-trimethylindoline 57303-68-1 Indoline, 2-(4-ethoxyphenylazomethylene)-1,3,3-trimethyl-