2,4,6-CYCLOHEPTATRIEN-1-ONE, 2-HYDROXY-4-METHYL- 2-Hydroxy-4-methyl-2,4,6-cycloheptatrien-1-one 4-08-00-00314 (Beilstein Handbook Reference) 4-Methyl-tropolone 583-80-2 BRN 2040642