Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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317/00
Heterocyclic compounds containing five-membered rings having two oxygen atoms as the only ring hetero atoms
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C07D317/08
having the hetero atoms in positions 1 and 3
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C07D317/10
not condensed with other rings
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C07D317/14
with substituted hydrocarbon radicals attached to ring carbon atoms
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C07D317/18
Radicals substituted by singly bound oxygen or sulfur atoms
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