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2-[(4S,5R)-5-[(1R,3R,3Ar,7R,7aR)-4-methyl-7-propan-2-yl-3-prop-2-ynyl-1,3,3a,6,7,7a-hexahydro-2-benzofuran-1-yl]-5-methyl-2-oxo-1,3-dioxolan-4-yl]ethyl 2,2-dimethylpropanoate


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