Fig. 1.

Structures of labels used in reversed-phase chromatography of oligosaccharides. AA anthranilic acid, AA-Ac 3-(acetylamino)-6-aminoacridine, AB 2-aminobenzamide, ABBE 4-aminobenzoic acid butyl ester, ABEE 4-aminobenzoic acid ethyl ester, ABME >4-aminobenzoic acid methyl ester, ABP 2-amino-5-bromopyridine, AMAC 2-aminoacridone, ANTS 2-aminonapthalene trisulfone, HOA 4-n-heptyloxyaniline, INLIGHT individuality normalization when labeling with isotopic glycan hydrazide tags, PA 2-aminopyridine, PMP 1-phenyl-3-methyl-5-pyrazolone