Quantitative Structure-Activity Relationship (QSAR) studies for a series of
antiasthmatic agents have been discussed. Significant correlations of the
activity were observed when topological indices viz. Szeged Index (Sz), mol
ecular negentropy (N) and first-order valence connectivity index ((1)chi(v)
) were coupled with other structural descriptors. Finally, an excellent cor
relation is obtained by introducing the component of Wiener index i.e. Wd t
aking care of the double bond contribution.