2,4-Dimethyl-alpha-pyrone 2H-PYRAN-2-ONE, 4,6-DIMETHYL- 4,6-Dimethyl-2-pyrone 4,6-Dimethyl-2H-pyran-2-one 4,6-Dimethyl-alpha-pyrone 4,6-Dimethylcoumalin 5-17-09-00409 (Beilstein Handbook Reference) 675-09-2 BRN 0002468 EINECS 211-618-7 Mesitene lactone NSC 402790