Hycobal

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:18408
http://www.hmdb.ca/metabolites/HMDB0002086
http://www.genome.jp/dbget-bin/www_bget?drug:D00042
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=347911148
https://www.chemspider.com/Chemical-Structure.21864853.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=21373
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=18408
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL3833359
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/B1Z
https://en.wikipedia.org/wiki/Adenosylcobalamin