Patent classifications
C
CHEMISTRY; METALLURGY
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C07
ORGANIC CHEMISTRY
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C07D
HETEROCYCLIC COMPOUNDS
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305/00
Heterocyclic compounds containing four-membered rings having one oxygen atom as the only ring hetero atoms
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C07D305/02
not condensed with other rings
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C07D305/04
having no double bonds between ring members or between ring members and non-ring members
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C07D305/06
with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to the ring atoms
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