1125-21-9 2,6,6-Trimethyl-2-cyclohexene-1,4-dione 2,6,6-Trimethylcyclohex-2-ene-1,4-dione 2-CYCLOHEXENE-1,4-DIONE, 2,6,6-TRIMETHYL- 3,5,5-Trimethyl-2-cyclohexene-1,4-dione 4-Oxo-alpha-isophorone 4-Oxoisophorone 6-Oxoisophorone EINECS 214-406-2 FEMA No. 3421 Ketoisophorone Oxopholone Oxophorone keto-Isophorone