2R-cis-2-(β-methoxymethylenoxyethyl)-2,3-dihydro-3-hydroxyfurane

phenylmethyl-2,3-O-(1-methylethylidene)-5,6-didehydro-5,6-dideoxy-α-D-mannofuranoside

(4S,6R)-4-But-3-enyl-2,2,6-trimethyl-[1,3]dioxane