2,3-Pentanedione, 4-methyl- 4-METHYL-2,3-PENTANEDIONE 4-Methylpentane-2,3-dione 7493-58-5 Acetyl isobutyryl EINECS 231-328-4 FEMA No. 2730 Isopropyl methyl diketone Methyl isopropyl diketone