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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309/00
Sulfonic acids; Halides, esters, or anhydrides thereof
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C07C309/28
having sulfo groups bound to carbon atoms of six-membered aromatic rings of a carbon skeleton
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C07C309/45
containing nitrogen atoms, not being part of nitro or nitroso groups, bound to the carbon skeleton
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C07C309/47
having at least one of the sulfo groups bound to a carbon atom of a six-membered aromatic ring being part of a condensed ring system
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