The “artificial strawberry flavor” in a McDonald’s milkshake is made up of ~45 chemicals including: amyl acetate, amyl butyrate, amyl valerate, anethol, anisyl formate, benzyl acetate, benzyl isobutyrate, butyric acid, cinnamyl isobutyrate, cinnamyl valerate, cognac essential oil, diacetyl, dipropyl ketone, ethyl butyrate, ethyl cinnamate, and more. – WTF Fun Facts
Source: The 59 ingredients in a fast-food strawberry milkshake | Food | The Guardian