Pental

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0000002
http://classyfire.wishartlab.com/tax_nodes/C0001346
http://classyfire.wishartlab.com/tax_nodes/C0000075
http://classyfire.wishartlab.com/tax_nodes/C0000291
http://classyfire.wishartlab.com/tax_nodes/C0002202
http://classyfire.wishartlab.com/tax_nodes/C0000364
http://classyfire.wishartlab.com/tax_nodes/C0003633
http://classyfire.wishartlab.com/tax_nodes/C0004139
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0000278
http://classyfire.wishartlab.com/tax_nodes/C0003940
http://classyfire.wishartlab.com/tax_nodes/C0004150
http://classyfire.wishartlab.com/tax_nodes/C0001831
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:7983
http://www.hmdb.ca/metabolites/HMDB0014457
http://www.genome.jp/dbget-bin/www_bget?drug:D00499
http://www.genome.jp/dbget-bin/www_bget?cpd:C07422
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=4737
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508399
https://www.chemspider.com/Chemical-Structure.4575.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50055935
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=8004
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=7983
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL448
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000671
http://www.pharmgkb.org/drug/PA450859
http://www.rxlist.com/cgi/generic2/pentob.htm
https://www.drugs.com/mtm/pentobarbital.html
https://en.wikipedia.org/wiki/Pentobarbital