Papyracillic acid, method for preparation and its use as a bioactive substance

摘要

This invention relates to a new biological active compound and its derivatives shown as (I). whereas R is a) a hydrogen (Ia) or b) R represents a branched or unbranched Alkylgroup (Ib). More particularly, this invention relates to papyracillic acid (Ia), derivatives (Ib) and salts thereof especially their pharmaceutical acceptable salts, to process of preparation thereof and to bioactive, preferred pharmaceutical, compositions comprising the same.