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. 2017 Aug 15;7:8239. doi: 10.1038/s41598-017-07836-y

Figure 2.

Figure 2

Synthesis of sulfo-sialic acid analogues. α-Anomers 2a, 3a, 5a and 7a are in the R anomeric configuration with equatorial anomeric functional groups, and β-anomers 2b, 3b, 4b, 5b, 6b, 7b and 8b are in the S anomeric configuration with axial anomeric functional groups.