a class of heterocyclic compounds containing an oxygen atom and a nitrogen atom in a six-membered ring.
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3-Furancarbonitrile, 4,5-dihydro-5-phenyl-2-(1-piperidinyl)-
Piperidine
Fluorobenzene
1-methyl-4-hydroxy-4-(2'-phenyl-2'-aminoethyl)-piperidine
