From the FDA's site:
Do you have to parenthetically declare all of the ingredients in flavors that conform to a standard of identity?
Answer: If the flavor is declared by the standardized name (eg. vanilla extract), each ingredient must also be declared parenthetically following the standardized name. However, the standardized flavor may simply be declared as flavoring, natural flavoring, artificial flavoring, as appropriate. 21 CFR 101.22(i) and 21 CFR 169