Synonyms: BRN 5841981;1,7-Dioxadispiro(4.0.4.2)dodeca-2,8-diene-11,12-dicarboxylic acid, 2,8-bis(4-methylphenyl)-3,9-dibromo-4,10-dioxo-, dimethyl ester, (5-alpha,6-alpha,11-alpha,12-alpha)-;AC1MILBH;LS-62226;142273-66-3;dimethyl 2,9-dibromo-3,8-bis(4-methylphenyl)-1,10-dioxo-4,7-dioxadispiro[4.0.4^{6}.2^{5}]dodeca-2,8-diene-11,12-dicarboxylate