Patent ID: 7491707

Claim:
A compound of the following formula: (a) wherein at least one of R 1 , R 2 , R 3 , R 4 , R 5 is selected, independently, from the group consisting of the following structures (b) wherein the remaining R 1 , R 2 , R 3 , R 4 , and/or R 5 , if any, are selected independently from the group consisting of hydrogen, —R, —COR and the following structures (c) wherein each R, R′, R″ is independently chosen to be a substituted or unsubstituted, branched or linear C 1-20 saturated or unsaturated aliphatic hydrocarbon; wherein A, B and L are independently selected from the group consisting of —CH 2 —, —C(═O)— and —C(═S)— groups; wherein each X is independently selected from the group consisting of —OH, —SH, —NH 2 , and -halogen; wherein m and n are independently selected from the range of integers between 0 and 10 inclusive, wherein X 1 and X 2 are —O— or —NH—; wherein Y 1 and Y 2 are independently selected from the group consisting of —OH, —OP(O)(OH) 2 , —COOH, —OSO 3 H, —CH(COOH) 2 and —OP(O)(OH)(OCH 2 CH 2 NH 2 ); wherein Z is H, —CH 2 E, or —CH 2 MG, where E is -hydrogen, -halogen, —OH, —NH 2 , —OSO 3 H, —SO 3 H, —P(O)(OH) 2 or —OP(O)(OH) 2 ; M is —O—, —S—, —OC(═O)—, —SC(═O)—, —OC═(S)—, or —NHC(═O)—; G is a -hydrogen, or a substituted or unsubstituted, branched or linear, saturated or unsaturated C 1-20 aliphatic hydrocarbon; or a physiologically acceptable salt thereof; wherein said compound, or salt thereof, when administered to mice, increases T-cell proliferation and/or interferon gamma production.