7-Methylxanthine is a methyl derivative of xanthine, the purine component of human urinary calculi.7-Methylxanthine has an affinity for adenosine receptors.7-Methylxanthine is a methyl derivative of xanthine, the purine component of human urinary calculi.7-Methylxanthine has an affinity for adenosine receptors.

Doxofylline (Doxophylline) is a methylxanthine derivative with the presence of a dioxolane group in position 7. As a drug used in the treatment of asthma, doxofylline has shown similar efficacy to theophylline but with significantly fewer side effects in animal and human studies.