98105-45-4 Boc-achpa L-threo-Pentonic acid, 5-cyclohexyl-2,4,5-trideoxy-4-(((1,1-dimethylethoxy)carbonyl)amino)- N-(tert-Butoxycarbonyl)cyclotine tert-Butyloxycarbonyl-4-amino-3-hydroxy-5-cyclohexylpentanoic acid