(2R,3R)-3-((E)-(1R,2S,3R)-1,2,3-Tris-benzyloxy-5-methoxycarbonyl-pent-4-enyl)-oxirane-2-carboxylic acid

(2R,3R)-3-((E)-(1R,2S,3R)-1,2,3-Tris-benzyloxy-5-methoxycarbonyl-pent-4-enyl)-oxirane-2-carboxylic acid methyl ester