(R)-3-tert-Butoxycarbonylamino-3-[6-chloro-5-((5R,6R,7S)-6-hydroxy-9-iodo-2,2-dimethyl-1,3-dioxa-spiro[4.4]non-8-en-7-yloxy)-pyridin-2-yl]-propionic acid methyl ester

(S)-3-{(R)-1-Methoxymethoxy-2-[(4-methoxy-phenyl)-diphenyl-methoxy]-ethyl}-6-triethylsilanyl-hexa-1,5-diyn-3-ol

3-tert-butoxycarbonylamino-3-{5-[6-(tert-butyl-dimethyl-silanyloxy)-9-iodo-2,2-dimethyl-1,3-dioxa-spiro[4.4]non-8-en-7-yloxy]-6-chloro-pyridin-2-yl}-propionic acid 3-ethynyl-3-hydroxy-2-methoxymethoxy-6-triethylsilanyl-hex-5-ynyl ester

3-tert-butoxycarbonylamino-3-{5-[6-(tert-butyl-dimethyl-silanyloxy)-9-iodo-2,2-dimethyl-1,3-dioxa-spiro[4.4]non-8-en-7-yloxy]-6-chloro-pyridin-2-yl}-propionic acid 3-ethynyl-2-methoxymethoxy-6-triethylsilanyl-3-triethylsilanyloxy-hex-5-ynyl ester