(R)-3-((R)-3,3-dimethyl-1-nitrobutan-2-yl)-4-phenyloxazolidin-2-one

L-tert-leucinamide

频哪酮

N-acetyl-tert-leucine

(+/-)-2-acetylamino-3,3-dimethylbutyric acid 2-chloroethyl ester