(2S,3S)-3-(2-Bromo-ethyl)-2-methyl-2-(3-methyl-but-3-enyl)-1,4-dioxa-spiro[4.4]nonane

(S)-5-[(2S,5R,2'R,3'S,5'R)-5'-((2S,3S,5R,6R)-6-Benzyloxymethyl-6-methoxy-3,5-dimethyl-tetrahydro-pyran-2-yl)-2-ethyl-3'-methyl-octahydro-[2,2']bifuranyl-5-yl]-5-triethylsilanyloxy-hexan-2-one

(3R,5S,6S)-6-{(2R,4S,5R)-5-[(1S,4S)-4-((S)-5-Bromomethyl-2,5-dimethyl-tetrahydro-furan-2-yl)-1-ethyl-1,4-dihydroxy-butyl]-4-methyl-tetrahydro-furan-2-yl}-3,5-dimethyl-tetrahydro-pyran-2-one

(3R,5S,6S)-3,5-Dimethyl-6-((2R,4S,5R)-4-methyl-5-{3-[(2S,3S)-3-methyl-3-(3-methyl-but-3-enyl)-1,4-dioxa-spiro[4.4]non-2-yl]-propionyl}-tetrahydro-furan-2-yl)-tetrahydro-pyran-2-one

(2S,2'R,5'S,2''R,3''S,5''R)-5''-((2S,3S,5R,6R)-6-Benzyloxymethyl-6-methoxy-3,5-dimethyl-tetrahydro-pyran-2-yl)-5-bromomethyl-5'-ethyl-2,5,3''-trimethyl-dodecahydro-[2,2';5',2'']terfuran

(3R,5S,6S)-6-((2R,3S,5R,2'S,5'R,2''S)-5''-Bromomethyl-2'-ethyl-3,2'',5''-trimethyl-dodecahydro-[2,2';5',2'']terfuran-5-yl)-3,5-dimethyl-tetrahydro-pyran-2-one

(3R,5S,6S)-6-((2R,4S,5R)-5-{(S)-1-Ethyl-1-hydroxy-3-[(2S,3S)-3-methyl-3-(3-methyl-but-3-enyl)-1,4-dioxa-spiro[4.4]non-2-yl]-propyl}-4-methyl-tetrahydro-furan-2-yl)-3,5-dimethyl-tetrahydro-pyran-2-one