1,3-Butanediol is present in pepper (c. annuum). 1,3-Butanediol is a solvent for flavouring agents and is an organic compound, an alcohol. It is extensively used as a solvent for food flavoring agents and is a co-monomer utilized in certain polyurethane and polyester resins. It is one of four stable isomers of butanediol. In biology, 1,3-butanediol is used as a hypoglycaemic agent. 1,3-Butanediol belongs to the family of Secondary Alcohols. These are compounds containing a secondary alcohol functional group, with the general structure HOC(R)(R') (R,R'=alkyl, aryl).