Wiswesser Line Notation
Wiswesser Line Notation ( WLN ) is a complicated and also outdated linear structure code for chemical compounds , invented in 1954 by WJ Wiswesser. Individual letters represent a specific structural fragment, a character string represents the entire structure. The WLN notation has been used by many databases (for example ISI, RTECS ) and also by pharmaceutical databases.
- 1H = CH 4 methane
- 2H = CH 3 -CH 3 ethane
- 3H = CH 3 -CH 2 -CH 3 propane
- QVR BG CG DG EG FG = C 7 HCl 5 O 2 pentachlorobenzoic acid
See also
literature
- William J. Wiswesser: How the WLN began in 1949 and how it might be in 1999 . In: J. Chem. Inf. Comput. Sci. . 22, No. 2, 1982, pp. 88-93. doi : 10.1021 / ci00034a005 .
- Andrew Dalke: WLN - History of Chemical Nomenclature . 2003. Retrieved December 17, 2006.