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[6-[(8S,10S,17S,18S)-17-[4-Acetyloxy-6-methyl-4-[(5R)-5-methyl-2-oxo-1,3-dioxolan-4-yl]oxan-2-yl]oxy-19-(dimethoxymethyl)-10,13-dihydroxy-6-methoxy-3-methyl-11-oxospiro[16,20,22-trioxahexacyclo[17.2.1.02,15.05,14.07,12.017,21]docosa-2(15),3,5(14),6,12-pen


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