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  • (1R)-1-(2-hydroxy-5-oxo-2,5-dihydrofuran-3-yl)-2-((1'S,4a'R,4b'S,8a'S,10a'R)-4b',8',8',10a'-tetramethyldodecahydro-1'H-spiro[oxirane-2,2'-phenanthren]-1'-yl)ethyl acetate

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