Wiswesser line notation (WLN), invented by William J. Wiswesser in 1949, was the first line notation capable of precisely describing complex molecules. It was the basis of ICI Ltd's CROSSBOW database system developed in the late 1960s. WLN allowed for indexing the Chemical Structure Index (CSI) at the Institute for Scientific Information (ISI).
Wiswesser line notation (WLN), created by William J. Wiswesser in 1949, was the first notation system that could accurately depict intricate molecules. It served as the foundation for ICI Ltd's CROSSBOW database system developed in the late 1960s. WLN enabled indexing of the Chemical Structure Index (CSI) at the Institute for Scientific Information (ISI).