Estrogens

http://www.genome.jp/dbget-bin/www_bget?drug:D04070
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505680
https://www.chemspider.com/Chemical-Structure.9532.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4099
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=8389
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL2106240
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DNC001150
http://www.pharmgkb.org/drug/PA164754789
http://www.rxlist.com/premarin-drug.htm
https://www.drugs.com/cdi/conjugated-estrogens.html
https://en.wikipedia.org/wiki/Conjugated_estrogens