| abstract |
A pharmaceutical compound or an intermediate therefor, having the formula: D*-Linker*(R2')k-R2, where R2 and R2' (if present) is the amide or ester residue of an aliphatic amino acid, k is 0 or 1, D* is a Drug residue bearing an accessible function selected from amine, hydroxy and carboxy, or a group amenable to attachment to said accessible function, Linker* is an at least bifunctional linker comprising a first function bound to said accessible function spaced from a second function forming an amide or acyl bond with the aliphatic amino acid; wherein the compound is free from long chain fatty acid esters; and with the provisos that Linker* does not consist solely of alkoxy when the Drug comprises a lactamcarboxy or enolic hydroxy function and that the Drug is not a monohydric nucleoside. |