trans-4,5-Dibromocyclohexane-cis-1,2-dicarboxylic acid anhydride, 5,6-dibromohexahydro-2-benzofuran-1,3-dione, (+-)-4c,5t-Dibrom-cyclohexan-1c,2c-dicarbonsaeure-anhydrid, trans-4,5-Dibromo-cis-cyclohexanedicarboxylic anhydride, (+-)-4c,5t-dibromo-cyclohexane-1c,2c-dicarboxylic acid-anhydride,