Guanidine

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0004707
http://classyfire.wishartlab.com/tax_nodes/C0000278
http://classyfire.wishartlab.com/tax_nodes/C0000375
http://classyfire.wishartlab.com/tax_nodes/C0000375
http://classyfire.wishartlab.com/tax_nodes/C0003152
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0000117
http://classyfire.wishartlab.com/tax_nodes/C0004150
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:42820
http://metacyc.org/META/new-image?type=COMPOUND&object=CPD-13517
http://www.hmdb.ca/metabolites/HMDB0001842
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3520
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507543
https://www.chemspider.com/Chemical-Structure.3400.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50420178
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=50675
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=42820
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL821
https://zinc.docking.org/substances/ZINC000008101126
http://www.pharmgkb.org/drug/PA164781028
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/GAI
https://www.drugs.com/mtm/guanidine.html
https://en.wikipedia.org/wiki/Guanidine