What is Wiswesser Line Notation?
'''Wiswesser Line Notation''', also referred to as '''WLN''', was the first [[line notation]] that precisely describes complex [[molecule]]s. The notation is simple, so that trained chemists as well as computers can translate it.<ref>{{cite web|url=http://openbabel.org/docs/dev/Cheminf101/represent.html|title=Representing Molecules|accessdate=2011-09-12|archive-date=2016-03-05|archive-url=https://web.archive.org/web/20160305235443/http://openbabel.org/docs/dev/Cheminf101/represent.html|url-status=dead}}</ref> It was invented by [[William Wiswesser|William J. Wiswesser]] in 1949.<ref>{{cite journal|author=William J. Wiswesser|title=How the WLN began in 1949 and how it might be in 1999|journal=[[Journal of Chemical Information and Computer Sciences|J. Chem. Inf. Comput. Sci.]]|year=1982|volume=22|issue=2|pages=88–93|doi=10.1021/ci00034a005}}</ref> The [[keypunch]] was the main data entry device when WLN was developed. Keypunches could only type capital letters(A-Z), numbers(0-9), and a few special characters(& / -). So, the symbols used in WLN were limited so that they could be stored on punched cards.<ref name=dalke/> == Examples == * 1V1: [[acetone]] * 2O2: [[diethyl ether]] * 1VR: [[acetophenone]]<ref>{{cite web|url=http://depth-first.com/articles/2007/07/20/everything-old-is-new-again-wiswesser-line-notation-wln/|title=Everything Old is New Again - Wiswesser Line Notation (WLN)|first=Rich |last=Apodaca|date=July 20, 2007|accessdate=2011-09-11}}</ref> * L66J BMR& DSWQ IN1&1: 6-dimethylamino-4-phenylamino-naphthalene-2-sulfonic acid<ref name=dalke>{{cite web |title=WLN – History of Chemical Nomenclature |date=October 15, 2003 |url=http://www.dalkescientific.com/writings/diary/archive/2003/10/15/WLN.html |accessdate=2011-09-11 |author=Andrew Dalke }}</ref> ==Related pages== * [[Simplified molecular input line entry specification]] (SMILES) * [[International Chemical Identifier]] (InChI) == References == {{reflist}} ==Other websites== * {{cite web|url=http://www.emolecules.com/doc/cheminformatics-101.htm|work