eNanoMapper	Material Organic Compound	Source
http://sweet.jpl.nasa.gov/2.3/matrOrganicCompound.owl#MethaneIce	http://purl.obolibrary.org/obo/ENVO_01001139	LOOM
http://sweet.jpl.nasa.gov/2.3/matrOrganicCompound.owl#MethaneClathrate	http://purl.obolibrary.org/obo/ENVO_01000851	LOOM