(R)-2-((4S,5S,6R,8S,10R)-10-Benzyloxy-6-benzyloxymethyl-4-ethyl-2,2-dimethyl-1,3,7-trioxa-spiro[4.5]dec-8-yl)-pentanoic acid methyl ester

(R)-2-((4S,5R,8S,10R)-4-Ethyl-10-hydroxy-2,2-dimethyl-6-methylene-1,3,7-trioxa-spiro[4.5]dec-8-yl)-pentanoic acid methyl ester

(R)-2-((2R,3R,4S,6S,8S)-2-Ethyl-4,8-dihydroxy-1,5-dioxa-spiro[2.5]oct-6-yl)-1-[2-hydroxy-3-hydroxymethyl-4-methoxymethoxy-5-((R)-1-methoxy-2-methyl-propyl)-phenyl]-pentan-1-one

(R)-2-((2R,3S,4S,6S,8S)-4,8-Bis-benzyloxy-2-ethyl-1,5-dioxa-spiro[2.5]oct-6-yl)-1-[3-(tert-butyl-dimethyl-silanyloxymethyl)-2,4-bis-methoxymethoxy-5-((R)-1-methoxy-2-methyl-propyl)-phenyl]-pentan-1-one

[(S)-2-((4S,5R,8S,10S)-10-Benzyloxy-4-ethyl-2,2-dimethyl-6-methylene-1,3,7-trioxa-spiro[4.5]dec-8-yl)-pentyloxy]-tert-butyl-diphenyl-silane