Disclosed are compounds of the formula: ##STR1## and the pharmaceutically acceptable salts thereof wherein R.sup.1 and R.sup.2 are independently alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl or haloalkynyl, each having 1 to 19 carbon atoms, or R.sup.2 is hydrogen; R.sup.3 is hydrogen, alkyl having 1 to 6 carbon atoms or hydroxyalkyl having 1 to 6 carbon atoms; R.sup.4 is hydrogen, halogen, amino or alkyl having 1 to 4 carbon atoms; R.sup.5, R.sup.6 and R.sup.7 are independently selected from hydrogen, hydroxy, alkyl having 1 to 6 carbon atoms, acyloxy having 1 to 8 carbon atoms, alkoxy having 1 to 6 carbon atoms, hydroxyalkyl having 1 to 6 carbon atoms, acyloxyalkyl having 1 to 12 carbon atoms, amino, alkylamino of 1 to 6 carbon atoms and --PO.sub.3.sup.=, or two of R.sup.5, R.sup.6 and R.sup.7 taken together form a group --OPO.sub.2 O.sup.- --, --CH.sub.2 OPO.sub.2 O.sup.- --, --CH.sub.2 OPO.sub.2 OPO.sub.2 O.sup.= --, or --OPO.sub.2 OPO.sub.2 O.sup.= --; A is O, S or CH.sub.2 and X is a pharmaceutically acceptable anion. The compounds have antiviral activity, especially against viruses of the herpes class.
公开的是以下式子的化合物:##STR1##和其药学上可接受的盐,其中R.sup.1和R.sup.2独立地为碳链含1至19个碳原子的烷基,卤代烷基,烯基,卤代烯基,炔基或卤代炔基,或R.sup.2为氢;R.sup.3为氢,含1至6个碳原子的烷基或含1至6个碳原子的羟基烷基;R.sup.4为氢,卤素,
氨基或含1至4个碳原子的烷基;R.sup.5、R.sup.6和R.sup.7独立地选择自氢,羟基,含1至6个碳原子的烷基,含1至8个碳原子的酰氧基,含1至6个碳原子的烷氧基,含1至6个碳原子的羟基烷基,含1至12个碳原子的酰氧基烷基,
氨基,含1至6个碳原子的烷基
氨基和--PO.sub.3.sup.=,或R.sup.5、R.sup.6和R.sup.7中的两个结合形成--OPO.sub.2 O.sup.- --,--CH.sub.2 OPO.sub.2 O.sup.- --,--CH.sub.2 OPO.sub.2 OPO.sub.2 O.sup.= --或--OPO.sub.2 OPO.sub.2 O.sup.= --的基团;A为O,S或CH.sub.2,X为药学上可接受的阴离子。这些化合物具有抗病毒活性,特别是对于疱疹类病毒。