Coffee is by far the most heavenly beverage ever drank by man. It also is a very complex drink filled with lots of different chemicals. However, it is important to remember that it is more than 98% water. The following is a list of the major substances found in roasted coffee. Keep in mind it is not definitive. This information is taken from Rinantonio Viani's chapter "The Composition of Coffee" found in Caffeine, Coffee, and Health which is edited by S. Garattini.
Purine Alkaloids
Minerals
Bases
Chlorogenic Acids
Caffeine
Calcium
Betaine
(3-; 4-; 5-) Chlorogenic acid
Liverine
Magnesium
Choline
(3,4-; 3,5-; 4,5-) Dicaffeoylquinic acid
Methylliberine
Phosphate ;
Niacin
< Feruloylquinic 5-) 4-; (3-;>
Paraxanthine
Potassium
Trigonelline
Theacrine
Sulphate
Theobromine
Theophylline
Lipids
Aliphatic Acids
Carbohydrates
Diterpene esters
(mainly cafestol and kahweol palmitate and linoleate)
Acetic
Arabinose
Free dietepenes
(mainly cafestol and kahweol)
C3-C10
Fructose
Free fatty acids
Citric
Galactose
Hydrocarbons
(mainly squalane and nonacosane)
Formic
Glucose
5-hydroxytryptamides
Fumaric
Inositol
Phospholipids
Lactic
Mannitol
Tocopherols (alpha, beta, gamma-isomers)
Malic
Mannose
Triglycerides (mainly esters of linoleic and palmitic acids)
