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[6-[(8S,10S,17S,18S)-19-(Dimethoxymethyl)-10,13-dihydroxy-17-[[(4R)-6-hydroxy-4,10-dimethyl-2-oxo-1,3,9-trioxaspiro[4.5]decan-8-yl]oxy]-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-penta


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