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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43/00
Ethers; Compounds having groups, groups or groups
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C07C43/257
having an ether-oxygen atom bound to carbon atoms both belonging to six-membered aromatic rings
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C07C43/275
having all ether-oxygen atoms bound to carbon atoms of six-membered aromatic rings
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