Examples include Calciferol

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0000012
http://classyfire.wishartlab.com/tax_nodes/C0000258
http://classyfire.wishartlab.com/tax_nodes/C0001460
http://classyfire.wishartlab.com/tax_nodes/C0001460
http://classyfire.wishartlab.com/tax_nodes/C0001553
http://classyfire.wishartlab.com/tax_nodes/C0001661
http://classyfire.wishartlab.com/tax_nodes/C0001292
http://classyfire.wishartlab.com/tax_nodes/C0004150
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:4591
http://www.lipidmaps.org/data/LMSDRecord.php?LMID=LMST03010056
http://www.hmdb.ca/metabolites/HMDB0015203
http://www.genome.jp/dbget-bin/www_bget?drug:D00299
http://www.genome.jp/dbget-bin/www_bget?cpd:C06957
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=5311071
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507699
https://www.chemspider.com/Chemical-Structure.4470607.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=3429
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=4591
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL2356023
https://zinc.docking.org/substances/ZINC000004212953
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000365
http://www.pharmgkb.org/drug/PA164744345
http://www.rxlist.com/cgi/generic/dhtinten.htm
https://www.drugs.com/mtm/dihydrotachysterol.html
https://en.wikipedia.org/wiki/Dihydrotachysterol