申请人:Beecham Group p.l.c.
公开号:US05108994A1
公开(公告)日:1992-04-28
Compounds of formula (I), and pharmaceutically acceptable salts thereof: ##STR1## wherein R.sub.1 is hydroxy or amino; R.sub.2 is hydrogen or amino; R.sub.3 is hydrogen, hydroxymethyl or acyloxymethyl; R.sub.4 is a group of formula: ##STR2## wherein R.sub.5 and R.sub.6 are independently selected from hydrogen, C.sub.1-6 alkyl and optionally substituted phenyl; or R.sub.3 and R.sub.4 together are: ##STR3## wherein R.sub.6 is as defined above; having antiviral activity, processes for their preparation and their pharmaceutical use.
式(I)的化合物及其药学上可接受的盐:##STR1##其中R.sub.1是羟基或氨基;R.sub.2是氢或氨基;R.sub.3是氢、羟甲基或醋氧甲基;R.sub.4是下式的基团:##STR2##其中R.sub.5和R.sub.6分别选自氢、C.sub.1-6烷基和可选择取代的苯基;或R.sub.3和R.sub.4一起是:##STR3##其中R.sub.6如上所定义;具有抗病毒活性,其制备方法及其药用。