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(19S,23S)-25-Methoxy-18,18-dimethyl-13,17,20,22-tetraoxahexacyclo[12.11.0.03,12.04,9.016,24.019,23]pentacosa-1(25),3(12),4,6,8,10,14,16(24)-octaene-2,21-dione


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