CHEMROF	Taxonomic Rank Vocabulary	Source
http://purl.obolibrary.org/obo/TAXRANK_0000023	https://w3id.org/chemrof/ClassificationLevelEnum#Subspecies	LOOM
http://purl.obolibrary.org/obo/TAXRANK_0000002	https://w3id.org/chemrof/ClassificationLevelEnum#Class	LOOM
http://purl.obolibrary.org/obo/TAXRANK_0000006	https://w3id.org/chemrof/ClassificationLevelEnum#Species	LOOM