Patent ID: 7973084

Claim:
A sugar alcohol of formula 1, or a salt thereof: wherein, R 1 and R 2 are each independently H, alkyl, arylalkyl, cycloalkyl, heteroalkyl, —(CH 2 ) m NHR′, —(CH 2 ) 1 CO 2 R″, —COR′″, —SO 2 R″″, a basic amino acid residue, a fluorescent tag, or a physiologically active molecule selected from the group consisting of doxorubicin and paclitaxel, with the proviso that at least one of R 1 and R 2 is doxorubicin, paclitaxel, —COR′″ or the basic amino acid residue, wherein the basic amino acid is selected from the group consisting of histidine, lysine, and arginine; R′, R″, R′″ and R″″ are each independently H, alkyl, arylalkyl, cycloalkyl, heteroalkyl or a physiologically active molecule selected from the group consisting of doxorubicin and paclitaxel; m is an integer in the range of 2 to 5; l is an integer in the range of 1 to 5; and R 3 is n being an integer in the range of 1 to 12.