Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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311/00
Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
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C07D311/02
ortho- or peri-condensed with carbocyclic rings or ring systems
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C07D311/04
Benzo[b]pyrans, not hydrogenated in the carbocyclic ring
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C07D311/58
other than with oxygen or sulphur atoms in position 2 or 4
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C07D311/60
with aryl radicals attached in position 2
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C07D311/62
with oxygen atoms directly attached in position 3, e.g. anthocyanidins
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