There is disclosed compounds and pharmaceutical compositions that are a resolved R or S (preferably R) enantiomer of an .omega.-1 alcohol of a straight chain alkyl (C.sub.5-8) substituted at the 1-position of 3,7-disubstituted xanthine. The inventive compounds are effective in modulating...http://www.google.de/patents/US5739138?utm_source=gb-gplus-sharePatent US5739138 - Enantiomerically pure hydroxylated xanthine compounds to treat autoimmune diabetes 
