| abstract |
Compounds of formula (I) wherein R2? and R3? are the same or different and each represent unsubstituted or substituted acyl, and a) R1? represents lower alkyl, aralkyl or the phosphate, pyrophosphate, phosphorylethanolamine or pyrophosphorylethanolamine group, R4? represents the phosphate, pyrophosphate, phosphorylethanolamine or pyrophosphorylethanolamine group and one of R1? and R4? may additionally represent hydrogen and R5? represents hydrogen or a glycosyl radical or b) R1? represents hydrogen, lower alkyl or aralkyl and R4? and R5? represent hydrogen, which compounds are indicated for use as pharmaceuticals, in particular as immunostimulants. |