Compounds of formula (I) in which X is the residue of a non-glycosidic aliphatic 1,2-diol; R1 is an S-configurated methyl substituted with one carboxyl residue and one other substituent; and R2 is hydrogen, C1-C12alkyl or C6aryl; as mimetics of sialyl-Lewis X and sialyl-Lewis A.
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