(2S,4S,5S,6R)-6-[(4R,5S,6S)-6-(2-Benzyloxy-ethyl)-2,2,5-trimethyl-[1,3]dioxan-4-yl]-2-ethyl-5-hydroxy-4-methyl-heptanoic acid amide

(2S,3R,4S,5S,6R,9S,11S)-9-Ethyl-4-hydroxy-2-((2S,3S)-2-hydroxy-3-methyl-pent-4-enyl)-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(4S,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[(2S,3S,4S,5S,6R,9S,11S)-4-(tert-butyl-dimethyl-silanyloxy)-9-ethyl-3,5,11-trimethyl-8-oxo-1-oxa-7-aza-spiro[5.5]undec-2-yl]-4-methyl-hexanal

(2S,3S,4S,5S,6R,9S,11S)-4-(tert-Butyl-dimethyl-silanyloxy)-2-[(2S,3S)-2-(tert-butyl-dimethyl-silanyloxy)-3-methyl-pent-4-enyl]-9-ethyl-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(2S,3S,4S,5S,6R,9S,11S)-4-(tert-Butyl-dimethyl-silanyloxy)-2-[(2S,3S)-2-(tert-butyl-dimethyl-silanyloxy)-3-methyl-hept-6-ynyl]-9-ethyl-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(E)-(4S,5S)-5-(tert-Butyl-dimethyl-silanyloxy)-6-[(2S,3S,4S,5S,6R,9S,11S)-4-(tert-butyl-dimethyl-silanyloxy)-9-ethyl-3,5,11-trimethyl-8-oxo-1-oxa-7-aza-spiro[5.5]undec-2-yl]-4-methyl-hex-2-enal

(2S,3R,4S,5S,6R,9S,11S)-9-Ethyl-4-hydroxy-2-(2-hydroxy-ethyl)-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(2S,4S,6S)-2-Ethyl-4-methyl-5-oxo-6-[(4S,5S,6S)-2,2,5-trimethyl-6-(2-oxo-ethyl)-[1,3]dioxan-4-yl]-heptanoic acid amide

(2R,3S)-3-(tert-Butyl-dimethyl-silanyloxy)-4-[(2S,3S,4S,5S,6R,9S,11S)-4-(tert-butyl-dimethyl-silanyloxy)-9-ethyl-3,5,11-trimethyl-8-oxo-1-oxa-7-aza-spiro[5.5]undec-2-yl]-2-methyl-butyraldehyde

(2S,4S,6S)-6-[(4S,5S,6S)-6-(2-Benzyloxy-ethyl)-2,2,5-trimethyl-[1,3]dioxan-4-yl]-2-ethyl-4-methyl-5-oxo-heptanoic acid amide

(2S,3R,4S,5S,6R,9S,11S)-2-(2-Benzyloxy-ethyl)-9-ethyl-4-hydroxy-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one

(2S,3R,4S,5S,6R,9S,11S)-2-((2S,3S)-7-Bromo-2-hydroxy-3-methyl-hept-6-ynyl)-9-ethyl-4-hydroxy-3,5,11-trimethyl-1-oxa-7-aza-spiro[5.5]undecan-8-one