(4S,5R)-4-Cyclohexylmethyl-2,2-dimethyl-oxazolidine-3,5-dicarboxylic acid 3-tert-butyl ester 5-(5-iodo-pentyl) ester

(4S,5R)-4-Cyclohexylmethyl-2,2-dimethyl-oxazolidine-3,5-dicarboxylic acid 5-[5-((R)-2-benzyloxycarbonylamino-2-carboxy-ethylsulfanyl)-pentyl] ester 3-tert-butyl ester

((3R,4S,7R)-4-Cyclohexylmethyl-3-hydroxy-2,6-dioxo-1-oxa-9-thia-5-aza-cyclotetradec-7-yl)-carbamic acid benzyl ester