Synonyms: 1,14-DIMETHYL-4,10-DIOXATETRACYCLO[5.5.2.0(2,6).0(8,12)]TETRADEC-13-ENE-3,5,9,11-TETRAONE;1,14-dimethyl-4,10-dioxatetracyclo[5.5.2.0~2,6~.0~8,12~]tetradec-13-ene-3,5,9,11-tet;1,8-DIMETHYLBICYCLO(2,2,2)OCT-7-ENE-2,3,5,6-TETRACARBOXYLIC ACID DIANHYDRIDE