Novel antiviral compounds of the formula ##STR1## wherein each of R.sub.1 and R.sub.2, which are the same or different is hydrogen, hydroxy or fluoro; provided that R.sub.1 or R.sub.2 is hydrogen when R.sub.1 and R.sub.2 are different, and provided that R.sub.1 and R.sub.2 are hydroxy or fluoro when R.sub.1 and R.sub.2 are the same; or a physiologically acceptable salt or an optical isomer thereof, methods for their preparation, pharmaceutical preparations containing the compounds, and methods for the treatment of virus infections and other diseases caused by viruses.
该公式的新型抗病毒化合物为##STR1##其中R.sub.1和R.sub.2中的每一个,相同或不同,均为氢、羟基或
氟;但是当R.sub.1和R.sub.2不同时,R.sub.1或R.sub.2为氢,当R.sub.1和R.sub.2相同时,R.sub.1和R.sub.2为羟基或
氟;或其生理可接受的盐或其光学异构体,其制备方法,含有该化合物的药物制剂,以及用于治疗病毒感染和其他由病毒引起的疾病的方法。