L-arginine

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:16467
http://www.genome.jp/dbget-bin/www_bget?cpd:C00062
http://www.hmdb.ca/metabolites/HMDB0000517
http://www.genome.jp/dbget-bin/www_bget?drug:D02982
http://www.genome.jp/dbget-bin/www_bget?cpd:C00062
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6322
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507180
https://www.chemspider.com/Chemical-Structure.6082.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=21959
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=1091
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=16467
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1485
https://zinc.docking.org/substances/ZINC000001532525
http://www.pharmgkb.org/drug/PA448478
http://www.guidetopharmacology.org/GRAC/LigandDisplayForward?ligandId=721
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/ARG
https://www.drugs.com/npc/l-arginine.html
http://www.pdrhealth.com/drug_info/nmdrugprofiles/nutsupdrugs/lar_0024.shtml
https://en.wikipedia.org/wiki/Arginine