| abstract |
A COMPOUND OF FORMULA (1):(FORMULA 1)OR A SALT THEREOF, WHEREIN R1 AND R2 ARE EACH INDEPENDENTLY HYDROGEN, ACYL OR PHOSPHATE, PROVIDED THAT WHEN ONE OF R1 OR R2 IS PHOSPHATE, THE OTHER IS HYDROGEN; OR R1 AND R2 ARE JOINED TOGETHER TO FORM A CYCLIC ACETAL GROUP, A CYCLIC CARBONATE GROUP OR A CYCLIC PHOSPHATE GROUP.PROCESSES FOR PREPARING THESE COMPOUNDS AND THEIR USE IN THERAPY IS ALSO DESCRIBED. |