Pharmaceutical composition comprising, as active substance, at least two glycans or glycopeptides comprising independently of each other at least one motif of structure I: wherein: m 1,1 and m 2,1 are integers equal to 0 or 1, Hex 1 and Hex 2 represent Glc or Gal, provided that: - at least one of m 1,1 and m 2,1 is equal to 1, and - when Hex 1 is Glc, Hex 2 is Gal, - and when Hex 1 is Gal, Hex 2 is Glc, in association with a pharmaceutically acceptable vehicle, in particular a pharmaceutical composition, comprising at least two glycans or glycopeptides comprising at least one motif of structure I-1: wherein m 1,1 and m 2,1 have the meaning indicated above, or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I-2: wherein m 1,1 and m 2,1 have the meaning indicated above, or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 1 and m 2,1 is equal to 0, of particular formula II: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 0 and m 2,1 is equal to 1, of particular formula III: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 0 and m 2,1 is equal to 1, of particular formula III-2: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 and m 2,1 are equal to 1, of particular formula IV: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 and m 2,1 are equal to 1, of particular formula IV-2: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure V: wherein: m 1,1; m 1,2; m 2,1 and m 2,2 are integers equal to 0 or 1, provided that at least one of m 1,1; m 1,2; m 2,1 and m 2,2 is equal to 1. m 1,1 and m 2,1 are integers equal to 0 or 1, Hex 1 and Hex 2 represent Glc or Gal, provided that: - at least one of m 1,1 and m 2,1 is equal to 1, and - when Hex 1 is Glc, Hex 2 is Gal, - and when Hex 1 is Gal, Hex 2 is Glc, - at least one of m 1,1 and m 2,1 is equal to 1, and - when Hex 1 is Glc, Hex 2 is Gal, - and when Hex 1 is Gal, Hex 2 is Glc, in association with a pharmaceutically acceptable vehicle, in particular a pharmaceutical composition, comprising at least two glycans or glycopeptides comprising at least one motif of structure I-1: wherein m 1,1 and m 2,1 have the meaning indicated above, or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I-2: wherein m 1,1 and m 2,1 have the meaning indicated above, or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 1 and m 2,1 is equal to 0, of particular formula II: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 0 and m 2,1 is equal to 1, of particular formula III: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 is equal to 0 and m 2,1 is equal to 1, of particular formula III-2: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 and m 2,1 are equal to 1, of particular formula IV: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure I, wherein m 1,1 and m 2,1 are equal to 1, of particular formula IV-2: or in particular a pharmaceutical composition comprising at least two glycans or glycopeptides comprising at least one motif of structure V: wherein: m 1,1; m 1,2; m 2,1 and m 2,2 are integers equal to 0 or 1, provided that at least one of m 1,1; m 1,2; m 2,1 and m 2,2 is equal to 1. m 1,1; m 1,2; m 2,1 and m 2,2 are integers equal to 0 or 1, provided that at least one of m 1,1; m 1,2; m 2,1 and m 2,2 is equal to 1.