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http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0002448
http://classyfire.wishartlab.com/tax_nodes/C0000134
http://classyfire.wishartlab.com/tax_nodes/C0001286
http://classyfire.wishartlab.com/tax_nodes/C0000136
http://classyfire.wishartlab.com/tax_nodes/C0004646
http://classyfire.wishartlab.com/tax_nodes/C0002279
http://classyfire.wishartlab.com/tax_nodes/C0000323
http://classyfire.wishartlab.com/tax_nodes/C0004150
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:17594
http://metacyc.org/META/new-image?type=COMPOUND&object=HYDROQUINONE
http://www.hmdb.ca/metabolites/HMDB0002434
http://www.genome.jp/dbget-bin/www_bget?drug:D00073
http://www.genome.jp/dbget-bin/www_bget?cpd:C00530
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=785
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=310265227
https://www.chemspider.com/Chemical-Structure.764.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=26190
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=5509
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=17594
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL537
https://zinc.docking.org/substances/ZINC000005133378
http://www.pharmgkb.org/drug/PA449924
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/HQE
https://www.drugs.com/mtm/hydroquinone-topical.html
https://en.wikipedia.org/wiki/Hydroquinone