(2012/02/05)
(R)-1-cyclohexyl-2-(methoxy(methyl)amino)-2-oxoethylcarbamic acid benzyl ester
(R)-N-benzyloxycarbonylcyclohexylglicine
(R)-4-(2-carboxy-5-phenylthiophen-3-yl)-3-cyclohexyl-5-oxopiperazine-1-carboxylic acid tert-butyl ester
(R)-3-cyclohexyl-4-(2-methoxycarbonyl-5-phenylthiophen-3-yl)-5-oxopiperazine-1-carboxylic acid tert-butyl ester
(R)-3-cyclohexyl-5-oxopiperazine-1-carboxylic acid tert-butyl ester