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(1R,20S)-8-[[(4S)-2-Oxo-1,3-dioxolan-4-yl]methyl]-22,23-dioxa-8,18-diazahexacyclo[18.2.1.01,9.02,7.010,18.012,17]tricosa-2,4,6,9,12,14,16-heptaen-11-one


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