(organic chemistry) Used to name compounds in which a carbon atom (typically a methylene group) has been replaced by one of oxygen

plural of oxadiazole

(organic chemistry) Any five-membered heterocycle having two carbon atoms, two nitrogen atoms, one oxygen atom, and two double bonds

The herbicide 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-one

plural of oxadiazine

(organic chemistry) An unsaturated six-membered heterocycle having three carbon atoms, one oxygen atom, two nitrogen atoms and two double bonds

(organic chemistry) A six-membered saturated heterocycle containing three carbon atoms, two nitrogen atoms and one oxygen atom; any derivative of this compound

(organic chemistry) Describing any heterocycle having one or more oxygen atoms in the ring

(organic chemistry) A derivative of cephem in which an oxygen atom has been substituted for sulfur; the basis for a group of antibiotics

(pharmacology) A narrow-spectrum beta-lactam antibiotic made by chemical modification of penicillin and administered in the form of its hydrated sodium salt C₁₉H₁₈N₃NaO₅S·H₂O to treat infections caused by penicillin-resistant staphylococci.