(1S,2R,3S,4S,7R)-7-(tert-Butyl-dimethyl-silanyloxy)-5-oxo-3-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-bicyclo[2.2.2]octane-2-carboxylic acid methyl ester

(4R,5S)-2,2,4,7-Tetramethyl-1,3-dioxa-spiro[4.4]non-6-ene

tert-Butyl-dimethyl-((4R,5R,6S)-2,2,4-trimethyl-7-methylene-1,3-dioxa-spiro[4.4]non-6-yloxy)-silane

(3R,6S,1'S,2'S,3'R)-3-(1-benzyloxy-2,3-isopropylidenedioxybutyl)-2,5-diethoxy-3,6-dihydro-6-isopropylpyrazine

Thiocarbonic acid O-[(1S,2R,4S,5S,7R,8R)-5-[(E)-2-(dimethyl-phenyl-silanyl)-vinyl]-5-hydroxy-7-(4-methoxy-benzyloxymethyl)-8-((4R,5R)-2,2,5-trimethyl-[1,3]dioxolan-4-yl)-bicyclo[2.2.2]oct-2-yl] ester O-p-tolyl ester