(E)-(3R,6R,7R,10S,11R)-10-(tert-Butyl-dimethyl-silanyloxy)-3,11-diethyl-7-methyl-2-oxo-azacyclotetradec-8-ene-6-carboxylic acid methyl ester

(R)-5-azido-2-ethylpentanal

(E)-(R)-7-Azido-4-ethyl-hept-2-en-1-ol

[(2R,3R)-3-((R)-4-Azido-1-ethyl-butyl)-oxiranyl]-methanol

(E)-(R)-7-Azido-4-ethyl-hept-2-enoic acid ethyl ester

(R)-2-Ethyl-4-oxo-butyric acid benzyl ester

(4R,5S)-1-((R)-2-Ethyl-pent-4-enoyl)-3,4-dimethyl-5-phenyl-imidazolidin-2-one

(R)-4-(2,2-Dimethyl-4,6-dioxo-[1,3]dioxan-5-yl)-2-ethyl-butyric acid benzyl ester

(4R,5S)-1-((R)-5-Azido-2-ethyl-pentanoyl)-3,4-dimethyl-5-phenyl-imidazolidin-2-one

(R)-4-[5-((E)-(1R,4S,5R)-8-Azido-5-ethyl-4-hydroxy-1-methyl-oct-2-enyl)-2,2-dimethyl-4,6-dioxo-[1,3]dioxan-5-yl]-2-ethyl-butyric acid benzyl ester

(R)-4-{5-[(E)-(1R,4S,5R)-8-Azido-4-(tert-butyl-dimethyl-silanyloxy)-5-ethyl-1-methyl-oct-2-enyl]-2,2-dimethyl-4,6-dioxo-[1,3]dioxan-5-yl}-2-ethyl-butyric acid benzyl ester