(2S,3R)-1-(4-Methoxy-benzyloxy)-3-methyl-hex-5-yn-2-ol

Acetic acid (1S,2R)-1-(4-methoxy-benzyloxymethyl)-2-methyl-pent-4-ynyl ester

{(2R,3R)-3-[1-((2R,3R)-3-Allyl-1,4-dioxa-spiro[4.4]non-2-yl)-vinyl]-1,4-dioxa-spiro[4.4]non-2-ylethynyl}-trimethyl-silane

Acetic acid (E)-(1S,2R)-1-(4-methoxy-benzyloxymethyl)-2-methyl-4-methylene-7-{(2R,3R)-3-[1-((2R,3R)-3-trimethylsilanylethynyl-1,4-dioxa-spiro[4.4]non-2-yl)-vinyl]-1,4-dioxa-spiro[4.4]non-2-yl}-hept-6-enyl ester

Acetic acid (E)-(1S,2R)-7-{(2R,3R)-3-[1-((2R,3R)-3-ethynyl-1,4-dioxa-spiro[4.4]non-2-yl)-vinyl]-1,4-dioxa-spiro[4.4]non-2-yl}-1-(4-methoxy-benzyloxymethyl)-2-methyl-4-methylene-hept-6-enyl ester