4,9-Dioxatricyclo[5.3.0.0^{2,6}]decane-3,5,8,10-tetrone

1,2,3,4-cyclobutanetetracarboxylic dianhydride ; cyclobutane-1,2,3,4-tetracarboxylic dianhydride ,98% ; cyclobutanetetracarboxylic acid dianhydride ; cyclobutanetetracarboxylic dianhydride ; maleic anhydride cyclic dimer. ; cyclobutane-1,2,3,4-tetracarboxylic dianhydride ; 4,9-dioxatricyclo[5.3.0.02,6]decane-3,5,8,10-tetrone ; 1,2,3,4-cyclobutanetetracarboxylic acid dianhydride ; 1,2,3,4-cyclobutanetetracarboxylic dian& ; cyclobutane-1,2,3,4-tetracarboxylic