Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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243/00
Heterocyclic compounds containing seven-membered rings having two nitrogen atoms as the only ring hetero atoms
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C07D243/06
having the nitrogen atoms in positions 1 and 4
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C07D243/10
condensed with carbocyclic rings or ring systems
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C07D243/38
[b, e]- or [b, f]-condensed with six-membered rings
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