Acetic acid (2S,3R,4R,5R)-4-allyloxy-4-ethynyl-2-methoxy-5-vinyl-tetrahydro-furan-3-yl ester

methyl 5,6-deoxy-3-O-allyl-3-C-ethynyl-2-O-tert-butyldimethylsilyl-α-D-ribo-hex-5-enofuranoside

methyl 5,6-deoxy-3-O-allyl-3-C-ethynyl-β-D-ribo-hex-5-enofuranoside

Acetic acid (5aR,7R,8R,8aR)-7-methoxy-2,5a,7,8-tetrahydro-1,6-dioxa-cyclopenta[c]pentalen-8-yl ester

Acetic acid (5R,6R,8R,9R)-8-methoxy-4,6-divinyl-1,7-dioxa-spiro[4.4]non-3-en-9-yl ester