OptiPranolol

https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:6897
http://www.hmdb.ca/metabolites/HMDB0015345
http://www.genome.jp/dbget-bin/www_bget?drug:D02374
http://www.genome.jp/dbget-bin/www_bget?cpd:C07915
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?cid=31477
https://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=46505935
https://www.chemspider.com/Chemical-Structure.29193.html
https://mor.nlm.nih.gov/RxNav/search?searchBy=RXCUI&searchTerm=10824
https://www.ebi.ac.uk/chebi/searchId.do?chebiId=6897
https://www.ebi.ac.uk/chembldb/index.php/compound/inspect/CHEMBL1291
http://bidd.nus.edu.sg/group/cjttd/ZFTTDDRUG.asp?ID=DAP000480
http://www.pharmgkb.org/drug/PA164748727
http://www.rxlist.com/cgi/generic3/optipran.htm
https://www.drugs.com/cdi/metipranolol-drops.html
https://en.wikipedia.org/wiki/Metipranolol