Natural Products Ontology	Skin Physiology Ontology	Source
http://www.semanticweb.org/ontologies/2008/8/MultiscaleSkinPhysiologyOntology.owl#Lipid	http://purl.bioontology.org/ontology/CHEBI#lipid	LOOM
http://www.semanticweb.org/ontologies/2008/8/MultiscaleSkinPhysiologyOntology.owl#Protein	http://www.owl-ontologies.com/NPOntology.owl#Protein	LOOM
http://www.semanticweb.org/ontologies/2008/8/MultiscaleSkinPhysiologyOntology.owl#Cell	http://purl.org/biotop/biotop.owl#Cell	LOOM
http://www.semanticweb.org/ontologies/2008/8/MultiscaleSkinPhysiologyOntology.owl#Enzyme	http://www.owl-ontologies.com/NPOntology.owl#Enzyme	LOOM
http://www.semanticweb.org/ontologies/2008/8/SPO_lightweight_merged.owl#Phospholipid	http://www.owl-ontologies.com/NPOntology.owl#Phospholipid	LOOM