Contophylin

http://classyfire.wishartlab.com/tax_nodes/C0000000
http://classyfire.wishartlab.com/tax_nodes/C0004707
http://classyfire.wishartlab.com/tax_nodes/C0000278
http://classyfire.wishartlab.com/tax_nodes/C0002449
http://classyfire.wishartlab.com/tax_nodes/C0000469
http://classyfire.wishartlab.com/tax_nodes/C0004557
http://classyfire.wishartlab.com/tax_nodes/C0004150
http://www.hmdb.ca/metabolites/HMDB0015354
http://www.genome.jp/dbget-bin/www_bget?drug:D00227
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=9433
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46508784
https://www.chemspider.com/Chemical-Structure.9062.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=689
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=2659
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1370561
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000613
http://www.pharmgkb.org/drug/PA164781029
https://www.drugs.com/cdi/aminophylline.html
https://en.wikipedia.org/wiki/Aminophylline