Furfural

Furfural is an organic compound produced from a variety of agricultural byproducts, including corncobs, oat, wheat bran, and sawdust. The name furfural comes from the Latin word furfur, meaning bran, referring to its usual source. Aside from ethanol, acetic acid and sugar it is one of the oldest renewable chemicals.
Chemically, furfural is an aldehyde of furan. It is a colorless oily liquid with the odor of almonds, which quickly darkens when exposed to air.

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