1,3,3-Trimethyl-2-(2-(1,2,3,4-tetrahydro-1-quinoxalinyl)vinyl)-3H-indolium, chloride 28766-22-5 35170-40-2 Quinoxalinium, 1-((1,3-dihydro-1,3,3-trimethyl-2H-indol-2-ylidene)ethylidene)-1,2,3,4-tetrahydro-, chloride