@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

nalt:207999
  skos:altLabel "dioxopiperazines"@en, "piperazinediones"@en ;
  skos:broader nalt:14310 ;
  skos:hiddenLabel "piperazinedione"@en, "diketopiperazine"@en, "dioxopiperazine"@en ;
  dc:modified "2013-12-06"^^xsd:date ;
  dc:created "2013-11-13"^^xsd:date ;
  a <https://lod.nal.usda.gov/naltv#Chemical>, skos:Concept ;
  skos:prefLabel "dicetopiperazinas"@es, "diketopiperazines"@en ;
  ns0:marc001 "66045" ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> .

ns0:Chemical
  rdfs:label "Chemical"@en ;
  a owl:Class .

<https://lod.nal.usda.gov/nalt>
  rdfs:label "NALT Full"@en ;
  a skos:ConceptScheme .

nalt:14310
  skos:prefLabel "piperazinas"@es, "piperazines"@en ;
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:207999 .