| abstract |
A compound of formula or a salt, phosphate ester or acyl derivative thereof (defined below), wherein X is chlorine, a straight or branched chain C 1-6 alkoxy group, phenoxy, phenyl C 1-6 alkoxy, -NH 2, -OH or - An SH group, an acyl derivative, wherein one or two of the hydrogen in the acyclic-OH groups and / or one of the hydrogen atoms in the -NH2 group are replaced by RC groups in which R is hydrogen, C1-6 alkyl, phenyl, C1- 6 alkyl or imidazolyl provided that when X is -OH, the compound of formula I has a purity greater than 50% by weight of the pure compound with respect to its mono- and dibenzyl ethers, and the compound of formula I is different from a compound selected from the group consisting of: 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] guanine cyclic phosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] guanine cyclic pyrophosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2,6-diaminopurine; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2,6-diaminopurine cyclic phosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2,6-diaminopurine cyclic pyrophosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2-amino-6-chloropurine; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2-amino-6-chloropurine cyclic phosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2-amino-6-chloropurine cyclic pyrophosphate; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] guanine monophosphate monosodium salt; 9- [4'-hydroxy-3 '- (hydroxymethyl) butyl] -2,6-diaminopurine monophosphate monosodium salt and 9- [4'-hydroxy-3' - (hydroxymethyl) butyl] -2-avit |