Vitamin B1,2,3,6,12, Iron, Zinc Oxide, A, Folic Acid, D3 etc, but I don't know if it's a function of what they add, remove or simply other ingredients that usually accompany enriched flour, like preservatives.

Raw or whole foods are a few orders of magnitude more gentle on my stomach than foods that are engineered to be shelf stable for months at room temp in the pantry.