@prefix rdfs: . @prefix isac: . isac:estrone-3-glucuronide_e3g_ rdfs:label "estrone-3-glucuronide e3g" . @prefix isao: . isac:estrone-3-glucuronide_e3g_ isao:hasHead "e3g" ; isao:hasPreModifier "estrone-3-glucuronide" .