1,3,3-Trimethyl-2-(1-methylethylidene)-2,3-1H-indole 1,3,3-Trimethyl-2-isopropylideneindolenine 1H-Indole, 2,3-dihydro-1,3,3-trimethyl-2-(1-methylethylidene)- 82458-41-1