Scheme 5.
a) Enzymatic modular assembly of C2 “heavy chain”-branched asymmetrical Core M2 glycans 34−55 from tetrasaccharide 4 (50 and 51 were derived from 44 in one-pot, 52 and 53 were derived from 45 in one-pot); b) Enzymatic modular assembly of C6 “heavy chain”-branched asymmetrical Core M2 glycans 56−73 from tetrasaccharide 5 (68 and 69 were derived from 66 in one-pot, 70 and 71 were derived from 67 in one-pot).