5-(6-(acetyloxymethyl)-3-hydroxy-4-(5-hydroxy-5-(1-hydroxyethyl)-4-methoxy-6-methyl-tetrahydropyran-2-yl)oxy-5-(2-isothiocyanatobut-2-enoyloxy)tetrahydropyran-2-yl)-2-amino-5-hydroxy-3,6-dioxo-cyclohexene-1-carboxylic acid