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[(4Ar,6S,7R,8S,8aR)-6-[1,1-dichloro-2-(chloroamino)-2-oxoethyl]-2-phenyl-8-prop-2-enoxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-7-yl] acetate


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