Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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217/00
Heterocyclic compounds containing isoquinoline or hydrogenated isoquinoline ring systems
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C07D217/12
with radicals, substituted by hetero atoms, attached to carbon atoms of the nitrogen-containing ring
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C07D217/20
with oxygen atoms directly attached to the aromatic ring of said aralkyl radical, e.g. papaverine
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