Cytogan

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:465284
http://www.hmdb.ca/metabolites/HMDB0015139
http://www.genome.jp/dbget-bin/www_bget?drug:D00333
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=3454
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507294
https://www.chemspider.com/Chemical-Structure.3336.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=85707
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4678
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=465284
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL182
https://zinc.docking.org/substances/ZINC000000001505
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000645
http://www.pharmgkb.org/drug/PA449733
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/GA2
http://www.rxlist.com/cgi/generic/vitrasert.htm
https://www.drugs.com/cdi/ganciclovir-implant.html
https://en.wikipedia.org/wiki/Ganciclovir