সিস

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:77397
http://www.hmdb.ca/metabolites/HMDB0005038
http://www.genome.jp/dbget-bin/www_bget?drug:D07704
http://www.genome.jp/dbget-bin/www_bget?cpd:C07572
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=2771
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508746
https://www.chemspider.com/Chemical-Structure.2669.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=25870
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=2556
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=77397
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL549
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000118
http://www.pharmgkb.org/drug/PA449015
http://www.rxlist.com/cgi/generic/citalo.htm
https://www.drugs.com/citalopram.html
https://en.wikipedia.org/wiki/Citalopram