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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13/00
Cyclic hydrocarbons containing rings other than, or in addition to, six-membered aromatic rings
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C07C13/28
Polycyclic hydrocarbons or acyclic hydrocarbon derivatives thereof
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C07C13/54
with three condensed rings
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C07C13/547
at least one ring not being six-membered, the other rings being at the most six-membered
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C07C13/567
with a fluorene or hydrogenated fluorene ring system
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