Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
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275/00
Derivatives of urea, i.e. compounds containing any of the groups , the nitrogen atoms not being part of nitro or nitroso groups
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C07C275/28
having nitrogen atoms of urea groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
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C07C275/30
being further substituted by halogen atoms, or by nitro or nitroso groups
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