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(1R,2S,4S,5S,6R,7R,8R,9S,10S)-6,9-epoxy-4,5-(O-isopropylidenedioxy)tetracyclo[6.2.1.02,7.02,10]undecan-3-one
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(1R,2S,4S,5S,6R,7R,8R,9S,10S)-4-benzyl-6,9-epoxy-4,5-(O-isopropylidenedioxy)tetracyclo[6.2.1.02,7.02,10]undecan-3-one
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(1R,2S,4S,5S,6R,7R,8R,9S,10S)-6,9-epoxy-4-[hydroxy(phenyl)methyl]-4,5-(O-isopropylidenedioxy)tetracyclo[6.2.1.02,7.02,10]undecan-3-one
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[(1R,2S,4S,5S,6R,7R,8R,9S,10S)-6,9-epoxy-4,5-(O-isopropylidenedioxy)tetracyclo[6.2.1.02,7.02,10]undecan-3-on-4-yl](phenyl)methyl O-phenyl carbonothioate
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