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[(1S,3R,7R)-1,2-Dihydroxy-5,17-dioxo-4,6,15,19-tetraoxa-9-azapentacyclo[8.7.1.12,9.03,7.014,18]nonadeca-10(18),11,13-trien-12-yl]methyl 2,2-dimethylpropanoate


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