U-tab

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27902
http://www.genome.jp/dbget-bin/www_bget?cpd:C06570
http://www.hmdb.ca/metabolites/HMDB0014897
http://www.genome.jp/dbget-bin/www_bget?drug:D00201
http://www.genome.jp/dbget-bin/www_bget?cpd:C06570
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=54675776
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46506693
https://www.chemspider.com/Chemical-Structure.10257122.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50237605
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=10395
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=27902
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1440
https://zinc.docking.org/substances/ZINC000084441937
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001527
http://www.pharmgkb.org/drug/PA451640
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/TAC
http://www.rxlist.com/cgi/generic2/tetcycl2.htm
https://www.drugs.com/tetracycline.html
https://en.wikipedia.org/wiki/Tetracycline