1719-83-1;EINECS 217-009-2;SBB007762;Bicyclo(2.2.2)oct-7-ene-2,3:5,6-tetracarboxylic dianhydride;4,8-Etheno-1H,3H-benzo[1,2-c:4,5-c']difuran-1,3,5,7-tetrone, 3a,4,4a,7a,8,8a-hexahydro-;Bicyclo[2.2.2]-7-octene-2,3,5,6-tetracarboxylic acid dianhydride