Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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293/00
Heterocyclic compounds containing rings having nitrogen and selenium or nitrogen and tellurium, with or without oxygen or sulfur atoms, as the ring hetero atoms
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C07D293/10
condensed with carbocyclic rings or ring systems
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C07D293/12
Selenazoles; Hydrogenated selenazoles
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