(6R,25R)-5-Demethoxy-5-oxo-28-deoxy-6,28-epoxy-25-isopropylmilbemycin B
(6R,25R)-5-Demethoxy-5-oxo-28-deoxy-6,28-epoxy-25-isopropylmilbemycin B ??
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(6R,25R)-5-Demethoxy-5-oxo-28-deoxy-6,28-epoxy-25-isopropylmilbemycin B C??? ??, ??, ??
(6R,25R)-5-Demethoxy-5-oxo-28-deoxy-6,28-epoxy-25-isopropylmilbemycin B ?? ?? ? ???
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(6R,25R)-5-Demethoxy-5-oxo-28-deoxy-6,28-epoxy-25-isopropylmilbemycin B ?? ??
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