enantiometer

— In other derivatization procedures, 1-fluoro-2,4-dinitrophenyl-5-Lalanineamide (referred to in instrumentation manufacturers' advertisements as 'Marfey's reagent') enables the separation and determination of enantiometer ratios for amino acids by reversed-phase h.p.l.c., and the use of N-benzyloxycarbonylamino acids amidated with glycyl p-nitrophenyl-L-alanine methyl ester achieves the same objective.