Atomic Helium

http://classyfire.wishartlab.com/tax_nodes/C0000001
http://classyfire.wishartlab.com/tax_nodes/C0000423
http://classyfire.wishartlab.com/tax_nodes/C0000433
http://classyfire.wishartlab.com/tax_nodes/C0000433
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:33681
http://www.hmdb.ca/metabolites/HMDB0037238
http://www.genome.jp/dbget-bin/www_bget?drug:D04420
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=23987
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=310265068
https://www.chemspider.com/Chemical-Structure.22423.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=5140
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=33681
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1796997
http://www.pharmgkb.org/drug/PA449848
https://www.drugs.com/pro/helium.html
https://en.wikipedia.org/wiki/Helium