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C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
C07D498/12—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains three hetero rings
C07D498/18—Bridged systems
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Chemical & Material Sciences
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Organic Chemistry
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Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems
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Pharmaceuticals Containing Other Organic And Inorganic Compounds
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