名称:
PROCESSES FOR PREPARING 5,5-DIMETHYL-2-OXO-3-CYCLOPENTENE-1-CARBOXYLATE COMPOUNDS AND 3,5,5-TRIMETHYL-2-OXO-3-CYCLOPENTENE-1-CARBOXYLATE COMPOUNDS FROM 3,3-DIMETHYL-1-BUTENE-1,4-DICARBOXYLATE COMPOUNDS AND 1,3,3-TRIMETHYL-1-BUTENE-1,4-DICARBOXYLATE COMPOUNDS, AND 1,3,3-TRIMETHYL-1-BUTENE-1,4-DICARBOXYLATE COMPOUNDS