@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .

<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
nalt:34454_def
  a <https://lod.nal.usda.gov/naltv#Definition> ;
  rdf:value "Polyacenes with four ortho-fused benzene rings in a straight linear arrangement. This group is best known for the subclass called tetracyclines."@en, "Poliacenos con cuatro anillos de benceno orto-condensados en una disposición de línea recta. Este grupo es mejor conocido por la subclase llamada tetraciclinas."@es ;
  dc:source "Medical Subject Headings 2011" .

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

<https://lod.nal.usda.gov/naltv#Chemical>
  a owl:Class ;
  rdfs:label "Chemical"@en .

nalt:34454
  a <https://lod.nal.usda.gov/naltv#Chemical>, skos:Concept ;
  dc:created "2006-01-19"^^xsd:date ;
  dc:modified "2012-11-30"^^xsd:date ;
  skos:broader nalt:12311 ;
  skos:definition nalt:34454_def ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  skos:narrower nalt:148791, nalt:10210 ;
  skos:prefLabel "naphthacenes"@en, "naftacenos"@es ;
  ns0:marc001 "24801" .

nalt:148791
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:34454 ;
  skos:prefLabel "anthracyclines"@en, "antraciclinas"@es .

nalt:10210
  a ns0:Chemical, skos:Concept ;
  skos:broader nalt:34454 ;
  skos:prefLabel "tetraciclinas"@es, "tetracyclines"@en .

nalt:12311
  a ns0:Chemical, skos:Concept ;
  skos:narrower nalt:34454 ;
  skos:prefLabel "hidrocarburos aromáticos policíclicos"@es, "polycyclic aromatic hydrocarbons"@en .