(1R)-1-(4-morpholinomethyl)-5-oxo-5-(phenylmethoxy)pentyl (4S,5R)-4-(cyclohexylmethyl)-2,2-dimethyl-3-<(1,1-dimethylethoxy)carbonyl>-5-oxazolidinecarbxylate

(6R,7S,10S)-10-Amino-7-cyclohexylmethyl-6-hydroxy-1,4-dioxa-8-aza-cyclotridecane-5,9,13-trione

(7R,8S,11S)-11-Amino-8-cyclohexylmethyl-7-hydroxy-1,5-dioxa-9-aza-cyclotetradecane-6,10,14-trione