এক্সট্রাফল

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:27470
http://www.genome.jp/dbget-bin/www_bget?cpd:C00504
http://www.hmdb.ca/metabolites/HMDB0000121
http://www.genome.jp/dbget-bin/www_bget?drug:D00070
http://www.genome.jp/dbget-bin/www_bget?cpd:C00504
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=6037
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508092
https://www.chemspider.com/Chemical-Structure.5815.html
http://www.bindingdb.org/bind/chemsearch/marvin/MolStructure.jsp?monomerid=50237629
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=4511
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=27470
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1622
https://zinc.docking.org/substances/ZINC000008577218
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP001309
http://www.pharmgkb.org/drug/PA449692
https://www.ebi.ac.uk/pdbe-srv/pdbechem/chemicalCompound/show/FOL
https://www.drugs.com/folic_acid.html
http://www.pdrhealth.com/drug_info/nmdrugprofiles/nutsupdrugs/fol_0110.shtml
https://en.wikipedia.org/wiki/Folate