Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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313/00
Heterocyclic compounds containing rings of more than six members having one oxygen atom as the only ring hetero atom
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C07D313/06
condensed with carbocyclic rings or ring systems
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C07D313/10
condensed with two six-membered rings
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C07D313/14
[b,f]-condensed
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