N,O-bis (trimethylsilyl) trifluoracetamide (BSTFA) was used to derivat
ize D,L-proportional to-amino-n-butyric acid hydroxamate, D,L-valine h
ydroxamate, and L-leucine hydroxamate. A gas chromatogram of the silyl
ated derivative was obtained. The structures of the disubstituted deri
vatives were confirmed by NMR.