Photrexa

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:17015
http://www.genome.jp/dbget-bin/www_bget?cpd:C00255
http://www.hmdb.ca/metabolites/HMDB0000244
http://www.genome.jp/dbget-bin/www_bget?drug:D00050
http://www.genome.jp/dbget-bin/www_bget?cpd:C00255
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=493570
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46507342
https://www.chemspider.com/Chemical-Structure.431981.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50362895
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=9346
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=17015
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1534
https://zinc.docking.org/substances/ZINC000002036848
http://www.pharmgkb.org/drug/PA451242
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/RBF
https://www.drugs.com/mtm/riboflavin.html
http://www.pdrhealth.com/drug_info/nmdrugprofiles/nutsupdrugs/rib_0263.shtml
https://en.wikipedia.org/wiki/Riboflavin