4-hydroxy-2,3-dimethyl-5-methylidenecyclopent-2-en-1-one;4-hydroxy-2,3-dimethyl-5-methylene-cyclopent-2-en-1-one;4-hydroxy-2,3-dimethyl-5-methylene-1-cyclopent-2-enone;4-hydroxy-2,3-dimethyl-5-methylidene-cyclopent-2-en-1-one
4-hydroxy-2,3-dimethyl-5-methylidenecyclopent-2-en-1-one