cyclobutane-1,1-dicarboxylate(2-) cyclobutane-1,1-dicarboxylic acid cyclobutane-1,1-dicarboxylate(1-) 143.03498 1-carboxycyclobutanecarboxylate Hcbdca C6H7O4 InChI=1S/C6H8O4/c7-4(8)6(5(9)10)2-1-3-6/h1-3H2,(H,7,8)(H,9,10)/p-1 Gmelin:486356 -1 hydrogen cyclobutane-1,1-dicarboxylate Hcbdca(-) chebi_ontology CHEBI:35694 CCQPAEQGAVNNIA-UHFFFAOYSA-M OC(=O)C1(CCC1)C([O-])=O 143.11738 dicarboxylic acid monoanion