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Structures of the previously reported GSH : formaldehyde 2 : 1 adduct (GF2, (S)-1-((R,Z)-6-(carboxymethylimino)-1,3-oxathian-5-yl)-7-oxo-1,3-diazepane-4-carboxylic acid)8 and BiGF2 are shown. Predicted and observed 13C chemical shifts for the formaldehyde-derived methylenes are indicated.
