CAS: 4462-96-8 Molecular Formula: C6H6O3 Molecular Weight (g/mol): 126.111 InChI Key: NMNZZIMBGSGRPN-UHFFFAOYSA-N Synonym: 3-oxabicyclo 3.2.0 heptane-2,4-dione,perhydrocyclobuta c furan-1,3-dione,1,2-cyclobutanedicarboxylic anhydride,cyclobutane-1,2-dicarboxylic anhydride,1,2-cyclobutanedicarboxylic anhydride, cis-,,acmc-1ahmk,3-oxabicyclo 3.2.0 heptane-2, cis PubChem CID: 138261 IUPAC Name: 3-oxabicyclo[3.2.0]heptane-2,4-dione SMILES: C1CC2C1C(=O)OC2=O