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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C07D243/08
not condensed with other rings
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