Vanillic acid

[2][3] The highest amount of vanillic acid in plants known so far is found in the root of Angelica sinensis,[4] an herb indigenous to China, which is used in traditional Chinese medicine.

[5] It is one of the main natural phenols in argan oil.

[citation needed] It is also found in wine and vinegar.

[6] Vanillic acid is one of the main catechins metabolites found in humans after consumption of green tea infusions.

With Pd/C, NaBH4, and KOH as the oxidizing agent, the conversion was reported to occur in ~89% yield.

Skeletal formula of vanillic acid
Ball-and-stick model of the vanillic acid molecule
NFPA 704 four-colored diamond Health 1: Exposure would cause irritation but only minor residual injury. E.g. turpentine Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazards (white): no code