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4-Methyl-2,3-pentanedione has a characteristic pungent odor. This may be prepared from isonitroso methyl isobutyl ketone by treatment with concentrated H2S04; other methods employ mesityl oxide as the starting material.

Reported found in coffee, beer, avocado, malt and krill.

Frequently used in flavors for Banana, Butter, Butterscotch, Nut, Rum, StraJvberry, etc.

ChEBI:4-Methyl-2,3-pentanedione is an alpha-diketone.

Prepared from isonitroso methyl isobutyl ketone by treatment with concentrated H2SO4; other methods employ mesityl oxide as the starting material

Taste characteristics at 80 ppm: sweet, creamy, fruity, buttery, with a cooked estry nuance.