A-sone

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:50173
http://www.hmdb.ca/metabolites/HMDB0014602
http://www.genome.jp/dbget-bin/www_bget?drug:D02754
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5284513
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46509178
https://www.chemspider.com/Chemical-Structure.4447573.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50088429
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=16818
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=50173
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1131
https://zinc.docking.org/substances/ZINC000003798734
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000743
http://www.pharmgkb.org/drug/PA448039
http://www.rxlist.com/cgi/generic3/acitretin.htm
https://www.drugs.com/cdi/acitretin.html
http://www.pdrhealth.com/drug_info/rxdrugprofiles/drugs/sor1698.shtml
https://en.wikipedia.org/wiki/Acitretin