Natural Products Ontology	INCENTIVE Variables	Source
http://www.bioassayontology.org/bao#BAO_0000270	http://www.owl-ontologies.com/NPOntology.owl#RNA	LOOM
http://purl.obolibrary.org/obo/NCIT_C616	http://purl.bioontology.org/ontology/CHEBI#lipid	LOOM
http://www.bioassayontology.org/bao#BAO_0000175	http://www.owl-ontologies.com/NPOntology.owl#Protein	LOOM
http://purl.obolibrary.org/obo/NCIT_C735	http://purl.bioontology.org/ontology/CHEBI#peptide	LOOM
http://purl.obolibrary.org/obo/NCIT_C16554	http://www.owl-ontologies.com/NPOntology.owl#Enzyme	LOOM