(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

(3R,6R,7R,10R,11R)-10-(tert-Butyl-dimethyl-silanyloxy)-3,11-diethyl-7-methyl-2-oxo-azacyclotetradecane-6-carboxylic acid methyl ester

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

(E)-(3R,6R,7R,10S,11R)-3,11-Diethyl-10-hydroxy-7-methyl-2-oxo-azacyclotetradec-8-ene-6-carboxylic acid methyl ester

(E)-(9R,15R,16S,19R)-16-(tert-Butyl-dimethyl-silanyloxy)-9,15-diethyl-3,3,19-trimethyl-2,4-dioxa-11-aza-spiro[5.13]nonadec-17-ene-1,5,10-trione