IMPROVEMENTS IN PHARMACEUTICAL COMPOSITIONS

摘要

Compounds of formulae (I) or (II): wherein R is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group, that optionally includes at least one heteroatom in its carbon skeleton, and R<1¿ and R?2¿ are H, or an -OR?3¿ group in which R?3¿ is a substituted or unsubstituted alkyl, alkenyl, alkynyl, aryl, aralkyl aralkenyl, or aralkynyl group containing 4-12 carbon atoms, that optionally includes at least one heteroatom in its carbon skeleton, and R?1¿ and R?2¿ cannot both be H, and their use in therapeutic methods.