1(2H)-Quinoxalinecarboxylic acid, 7-chloro-3,4-dihydro-2,2-dimethyl-3-thioxo-, 1-methylethenyl ester 1-Methylethenyl 7-chloro-3,4-dihydro-2,2-dimethyl-3-thioxo-1(2H)-Quinoxalinecarboxylate 146739-86-8 6-Chloro-3,3-dimethyl-4-(isopropenyloxycarbonyl)-3,4-dihydroquinoxalin-2(1H)-thione S 2720 S-2720