These are man made chemicals which are combination of ethers ,esters ,aldehydes alcohols,resins and other odorous products.
These flaovours are more stable in storage &through baking .Most artificial flavors are specific and often complex mixtures ofsingular naturally occurring flavor compounds combined together to either imitate or enhance anatural flavor. These mixtures are formulated by flavorist to give a food product a unique flavor and to maintain flavor consistency between different product batches or after recipe changes. The list of known flavoring agents includes thousands of molecular compounds, and the flavor chemist (flavorist) can often mix these together to produce many of the common flavors.