E C

http://classyfire.wishartlab.com/tax_nodes/C0000001
http://classyfire.wishartlab.com/tax_nodes/C0000424
http://classyfire.wishartlab.com/tax_nodes/C0001270
http://classyfire.wishartlab.com/tax_nodes/C0001470
http://classyfire.wishartlab.com/tax_nodes/C0001476
http://classyfire.wishartlab.com/tax_nodes/C0000442
http://classyfire.wishartlab.com/tax_nodes/C0003866
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:33118
http://metacyc.org/META/new-image?type=COMPOUND&object=BORATE
http://www.hmdb.ca/metabolites/HMDB0035731
http://www.genome.jp/dbget-bin/www_bget?cpd:C12486
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=7628
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=347827967
https://www.chemspider.com/Chemical-Structure.7346.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=39817
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=1700
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=33118
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL42403
https://zinc.docking.org/substances/ZINC000245189278
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/BO3
https://en.wikipedia.org/wiki/Boric_acid