(3Z)-3-(1-hydroxyethylidene)-4-methylpyran-2,6-dione

4-甲基-2H-吡喃-2,6(3h)-二酮

(E)-3-methylpent-2-enedioic acid

8-hydroxy-1-methoxy-3-methylanthracene-9,10-dione

3-(2-hydroxyethyl)-3-methylpentane-1,5-diol