preferred_name: 3-O-{(1R)-1-[(1,3-dihydroxypropan-2-yl)oxy]-2-hydroxyethyl}-2,6-bis-O-{(1S)-1-[(1,3-dihydroxypropan-2-yl)oxy]-2-hydroxyethyl}-beta-D-Man-(1->4) -beta-D-GlcNAc-(1->4)-3-O-[(1S)-2-hydroxy-1-{[(2S)-1-hydroxypropan-2-yl]oxy}ethyl]-D-GlcNAc-yl group