(R)-2-[2-(3-allyloxycarbonylaminomethyl-1,2,4-oxadiazol-5-yl)-2-(5-hydroxy -pentanoylamino)-ethylsulfanylmethyl]-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-5-methoxy -6-methyl-benzoic acid

2-[(R)-2-[3-(Allyloxycarbonylamino-methyl)-[1,2,4]oxadiazol-5-yl]-2-(5-hydroxy-pentanoylamino)-ethylsulfanylmethyl]-3-[dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-5-methoxy-6-methyl-benzoic acid allyl ester

(8R,13S)-4-[Dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-2-methoxy-1-methyl-8-(3-methyl-[1,2,4]oxadiazol-5-yl)-10-thioxo-13-trityloxymethyl-8,9,10,11,12,13-hexahydro-5H,7H-14-oxa-6-thia-9-aza-benzocyclotridecen-15-one

(8R,14S)-4-[Dimethyl-(1,1,2-trimethyl-propyl)-silanyloxy]-2-methoxy-1-methyl-8-(3-methyl-[1,2,4]oxadiazol-5-yl)-10-thioxo-14-trityloxymethyl-7,8,9,10,11,12,13,14-octahydro-5H-15-oxa-6-thia-9-aza-benzocyclotetradecen-16-one

allyl 3-[dimethyl(thexyl)silyloxy]-2-[(R)-2-((R)-4-hydroxy-5-trityloxy-pentanoylamino)-2-(3-methyl-1,2,4-oxadiazol-5-yl)ethylsulfanylmethyl]-5-methoxy-6-methylbenzoate