英文别名2-Cyclopenten-1-one, 3,4-dimethyl-; 3,4-DIMETHYLCYCLOPENT-2-ENONE; 3,4-Dimethyl-2-cyclopenten-1-one; Dimethyl-2-cyclopentenone-1; 3,4-dimethyl-2-cyclopentenone; 3,4-dimethyl-cyclopenten-1-one; 3,4-dimethylcyclopentenone; 2-Cyclopenten-1-one,3,4-dimethyl 
