@prefix skos:	<http://www.w3.org/2004/02/skos/core#> .
@prefix isac:	<http://webisa.webdatacommons.org/concept/> .
isac:phthalic_acid_	skos:broader	isac:polybasic_acid_ .
isac:_acid_	skos:broader	isac:polybasic_acid_ .
isac:maleic_anhydride_	skos:broader	isac:polybasic_acid_ .
isac:sebacic_acid_	skos:broader	isac:polybasic_acid_ .
isac:trimellitic_anhydride_	skos:broader	isac:polybasic_acid_ .