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WikiPedia: Riboflavin http://redpoll.pharmacy.ualberta.ca/drugbank/cgi-b... http://chemapps.stolaf.edu/jmol/jmol.php?model=O%3... http://id.loc.gov/authorities/subjects/sh85143964 http://pubchem.ncbi.nlm.nih.gov/summary/summary.cg... //www.ncbi.nlm.nih.gov/pubmed/9484373 http://www.nlm.nih.gov/cgi/mesh/2007/MB_cgi?mode=&... http://www.ars.usda.gov/Services/docs.htm?docid=89... http://d-nb.info/gnd/4188444-9 http://ecb.jrc.it/esis/index.php?GENRE=ECNO&ENTREE... http://www.genome.ad.jp/dbget-bin/www_bget?cpd:D00...