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

(S)-2-Benzyl-N-((3R,4S,7R)-4-cyclohexylmethyl-3-hydroxy-2,6-dioxo-1-oxa-9-thia-5-aza-cyclotridec-7-yl)-3-(2-methyl-propane-2-sulfonyl)-propionamide

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

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