Pharmaceutical compositions containing xanthines

摘要

A pharmaceutical composition having as an essential ingredient a compound of the formula <IMAGE> (I), wherein one to three of R1, R2 and R3 represent an alkenyl group having from 4 to 8 carbon atoms, the other ones are alkyl having from 1 to 12 carbon atoms, and R1 may also be hydrogen, the compounds themselves and a process for preparing them.