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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C07D317/32
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 to ring carbon atoms
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