| abstract |
The invention relates to compounds of formula @@ in which Q is selected from the group consisting of @ and @ G e; W is NH; X is O; Y e O; Z1 and Z2 are each CH2; B1 and B2 are OH; R 1, R 2, R 3, R 4, R 5, R 7 and R 12 are selected from the group consisting of H and lower alkyl; R 6 is methyl; R8 is hydrogen or methyl; and R11 is or, wherein R is H, lower alkyl or lower alkyl substituted with CHO; and stereoisomers thereof, in particular "lower alkyl" means straight- or branched-chain unsubstituted hydrocarbon groups having 1 to 4 carbon atoms. |