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(2007/10/02)maleic anhydride
(1S)-7anti-isopropyl-5-methyl-bicyclo[2.2.2]oct-5-ene-2endo,3endo-dicarboxylic acid-anhydride
(1R)-7anti-isopropyl-5-methyl-bicyclo[2.2.2]oct-5-ene-2endo,3endo-dicarboxylic acid-anhydride
succinic acid anhydride
(R)-5-isopropyl-2-methylcyclohexa-1,3-diene