EINECS 244-604-4, 3,4-dimethyl-2-hydroxy-2-cyclopentenone, 3,4-Dimethyl-2-hydroxycyclopent-2-en-1-one, 2-Cyclopenten-1-one,2-hydroxy-3,4-dimethyl, 3,4-dimethylcyclopent-2-en-2-olone, 2-Hydroxy-3,4-dimethyl-2-cyclopenten-1-on, 2-hydroxy-3,4-dimethyl-2-cyclopentenone, 2-hydroxy-3,4-dimethyl-2-cyclopenten-1-one, 3,4-dimethyl-cyclopent-2-en-2-ol-1-one