Product analysis by GC of the enantioselective reduction of methyl benzoylformate. (A) MBF and racemic methyl mandelate standards. (B) Reaction products. The retention times for MBF, (R)-methyl mandelate [(R)-MM], and (S)-methyl mandelate [(S)-MM] were 13.938, 16.361, and 16.584 min, respectively, for panel A, and 13.958, 16.351, and 16.634 min, respectively, for panel B.