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GB03 produced (2R,3R)-(-)-2,3-butanediol identification based on rt matches of authentic standards. GC-flame ionization detector (FID) trace of synthetic (RS)-2,3-butanediol (rt 28.6 min; A), synthetic (2R,3R)-(-)-2,3-butanediol (rt 21.1 min; B), a mixture of (2S,3S)-(+)-2,3-butanediol (rt 20.3 min) and (2R,3R)-(-)-2,3-butanediol (C), and GB03 volatile profile containing (2R,3R)-(-)-2,3-butanediol (rt 21.03 min; D).
