Although bubblegum has a distinct flavor, if you check the ingredients list on a pack, it likely won't tell you that it contains anything more specific than "artificial flavor."
Flavor experts identify the scents in real foods and recreate them in labs. Bubblegum's yummy flavors mostly come from special chemicals called esters.
Esters are a combination of different alcohols and acids. The strawberry-banana bubblegum flavor comes from ethyl methylphenylglycidate and pentyl acetate.