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(16R,20R)-25-Methoxy-13,21,21-trimethyl-17,19,22-trioxa-13-azahexacyclo[12.11.0.03,12.04,9.015,23.016,20]pentacosa-1(25),3(12),4,6,8,10,14,23-octaene-2,18-dione


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