Xanthine derivatives

摘要

A novel xanthine derivative of the formula (I): s substituted or unsubstituted lower alkyl, lower alkenyl, lower alkynyl, substituted or unsubstituted alicyclic alkyl, substituted or unsubstituted phenyl, or substituted or unsubstituted benzyl; and the other represents -(CH2)m-X wherein m is 2 or 3, and X is amino substituted phenyl. Q representsifferent and are substituted or unsubstituted alicyclic alkyl), <IMAGE> or a pharmacologically accetable salt thereof is disclosed. This derivative has anti-dementia activity.