Methylxanthines are chemical compounds which are derivatives of xanthine with one or more methyl groups, including: One methyl group:
1-Methylxanthine 3-Methylxanthine 7-Methylxanthine Two methyl groups:
Theophylline (1,3-dimethylxanthine) Paraxanthine (1,7-dimethylxanthine) Theobromine (3,7-dimethylxanthine) Three methyl groups:
Caffeine (1,3,7-trimethylxanthine)
General references Fredholm, Bertil B. (22 September 2010). Methylxanthines. Springer Science & Business Media. ISBN 978-3-642-13443-2. Retrieved 16 February 2025.