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  • 2-((2R,6S)-6-(((4R,6S)-6-(((2R,3S,6R,8R,9S)-8-((1R,3S)-1-hydroxy-3-methyl-2-oxopent-4-en-1-yl)-9-methoxy-3-methyl-1,7-dioxaspiro[5.5]undec-4-en-2-yl)methyl)-2,2-dimethyl-1,3-dioxan-4-yl)methyl)tetrahydro-2H-pyran-2-yl)ethyl pivalate

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