Oxazoles |
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| 1,3-Oxazolium-5-Oxides; Munchnones; 1,3 Oxazolium 5 Oxides | |
| Five-membered heterocyclic ring structures containing an oxygen in the 1-position and a nitrogen in the 3-position, in distinction from ISOXAZOLES where they are at the 1,2 positions. | |