The search for the hexatic smectic F phase inN(p-n-alkoxybenzylidene)-p-n-alkylanilines, has revealed thatN(p-n-decyloxybenzylidene)-p-n-tetradecylaniline, 10O.14, exhibits a direct isotropic liquid to smectic F phase transition with a phase sequence variant FG, while both the compounds 10O.12 and 10O.16 exhibit the AFG phase sequence variant. This is the first observation of an isotropic liquid to smectic F phase transition innO.mcompounds.