Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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335/00
Heterocyclic compounds containing six-membered rings having one sulfur atom as the only ring hetero atom
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C07D335/04
condensed with carbocyclic rings or ring systems
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C07D335/10
Dibenzothiopyrans; Hydrogenated dibenzothiopyrans
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C07D335/14
with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 9
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C07D335/16
Oxygen atoms, e.g. thioxanthones
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