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?? ???? >13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone
13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone
13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone ??
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13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone C??? ??, ??, ??
13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone ?? ?? ? ???
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13-Acetoxy-1β,10α:4α,5α-di-epoxy-4β-methyl-8α-[(2-methylpropenoyl)oxy]-6α-hydroxy-15-nor-1,5-secoambrosan-12-oic acid γ-lactone ?? ??
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