Isotone

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0000012
http://classyfire.wishartlab.com/tax_nodes/C0000259
http://classyfire.wishartlab.com/tax_nodes/C0001606
http://classyfire.wishartlab.com/tax_nodes/C0001606
http://classyfire.wishartlab.com/tax_nodes/C0001551
http://classyfire.wishartlab.com/tax_nodes/C0003086
http://classyfire.wishartlab.com/tax_nodes/C0003544
http://classyfire.wishartlab.com/tax_nodes/C0000339
http://classyfire.wishartlab.com/tax_nodes/C0001137
http://classyfire.wishartlab.com/tax_nodes/C0001205
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:6067
http://www.lipidmaps.org/data/LMSDRecord.php?LMID=LMPR01090021
http://www.hmdb.ca/metabolites/HMDB0006219
http://www.genome.jp/dbget-bin/www_bget?drug:D00348
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5282379
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508729
https://www.chemspider.com/Chemical-Structure.4445539.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50031459
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=6064
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=6067
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL547
https://zinc.docking.org/substances/ZINC000003792789
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000009
http://www.pharmgkb.org/drug/PA450128
http://www.rxlist.com/cgi/generic/isotret.htm
https://www.drugs.com/cdi/isotretinoin.html
https://en.wikipedia.org/wiki/Isotretinoin