Well it seems as though some people have found a picture of a guy holding a book which contains a replica of the recipe for Coca Cola. The Ingredients are as follows:
The 'secret recipe'
Fluid extract of Coca 3 drams USP
Citric acid 3 oz
Sugar 30 (it is unclear from the markings what quantity is required)
Water 2.5 gal
Lime juice 2 pints 1 qrt
Caramel 1.5oz or more to colour
7X flavour (use 2oz of flavour to 5 gals syrup):
Orange oil 20 drops
Lemon oil 30 drops
Nutmeg oil 10 drops
Coriander 5 drops
Neroli 10 drops
Cinnamon 10 drops
Reading this, it's quite shocking. Some of the ingredients I can understand and can taste such as Cinnamon and Caramel e.t.c. But I had no idea that there was Alcohol in Coke....