Compounds of the general formula ##STR1## (wherein X represents an oxygen or sulphur atom, R.sup.1 represents a hydroxy or amino group, R.sup.2 represents a hydrogen atom or a group of formula --CH.sub.2 OR.sup.3.sub.a and R.sup.3 and R.sup.3.sub.a which may be the same or different, each represents an amino acid acyl radical) and physiologically acceptable salts thereof are useful for the treatment of viral infections and have been found to have a surprisingly high water-solubility which renders them of value in the formulation of aqueous pharmaceutical preparations. Processes for preparing the compounds are described.
通式为##STR1##(其中X代表氧或
硫原子,R.sup.1代表羟基或
氨基,R.sup.2代表氢原子或公式--CH.sub.2 OR.sup.3.sub.a的基团,R.sup.3和R.sup.3.sub.a可以相同也可以不同,每个代表
氨基酸酰基)和其生理上可接受的盐对于治疗病毒感染是有用的,而且发现它们具有惊人的高
水溶性,使它们在制备
水溶性药物制剂方面具有价值。描述了制备这些化合物的过程。