C-nil

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:63580
http://www.hmdb.ca/metabolites/HMDB0014949
http://www.genome.jp/dbget-bin/www_bget?drug:D00423
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=37542
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505883
https://www.chemspider.com/Chemical-Structure.34439.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50154375
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=9344
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=63580
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1643
https://zinc.docking.org/substances/ZINC000001035331
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DNC001210
http://www.pharmgkb.org/drug/PA451241
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/RBV
http://www.rxlist.com/copegus-drug.htm
https://www.drugs.com/cdi/ribavirin.html
https://en.wikipedia.org/wiki/Ribavirin