(2S,4S,5R,6R)-5-Azido-4-hydroxy-6-((2R,4S,5R)-5-methoxymethoxy-2-methyl-[1,3]dioxan-4-yl)-tetrahydro-pyran-2-carboxylic acid ethyl ester

(+)-(S,R-trans)-3-formyloxiranebutanoic acid methyl ester