CAS Nr.:4415-87-6 MF:c8h4o 6 MW:196.11 Nws EINECS No.:224-577-5 ib Synonym:3a,3b,6a,6b-Tetrahydrocyclobuta[1,2-c:3,4-c']difuran-1,3,4,6-tetrone; 4,9-Dioxatricyclo[5.3.0.02,6]decane-3,5,8,10-tetrone; Cyclobutane 1,2,3,4-tetracarboxylic acid 1,2:3,4-dianhydride; Cyclobutane-1,2,3,4-tetracarboxylic dianhydride, 98%; Cyclobutane-1,2,3,4-tetracarboxylic acid dianhydride; Cyclobutane-1,2,3,4-tetracarboxylic acid dianhydride (CBDA); Cyclobutane-1,2,3,4-tetracarboxylic