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(R)-2-[(2R,4S,5S,6R)-6-{(1R,3R)-3-[(4S,5S,6R)-6-((1R,2R)-1,2-Dihydroxy-1-methyl-butyl)-5-methyl-2-oxo-[1,3]oxazinan-4-yl]-1-hydroxy-1-methyl-butyl}-5-methyl-2-(2,4,6-trimethyl-phenyl)-[1,3]dioxan-4-yl]-thiopropionic acid S-pyridin-2-yl ester