| umls-concept:C0030004 | skos:definition | MSH: 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.,CSP: five-membered heterocyclic ring structures containing an oxygen in the 1-position and a nitrogen in the 3-position. | lld:umls |
