(8S,11S,12R)-11-(cyclohexylmethyl)-8-<-L-phenylalanyl>amino>-12-hydroxy-5,9,13-trioxo-1-oxa-4,10-diazacyclotridecane

(3R,4S,7S)-4-(cyclohexylmethyl)-7-<-L-phenylalanyl>amino>-3-hydroxy-2,6,10-trioxo-1-oxa-5,11-diazacyclotetradecane

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

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