  For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing
benzoxazole and stilbene groups is applied as a scintillator dopant acting as a
wavelength shifter. In this article a light yield of the plastic scintillator,
prepared from styrene doped with 2 wt% of 2,5-diphenylbenzoxazole and 0.03 wt%
of 2-(4-styrylphenyl)benzoxazole, is determined to be as large as 60% $\pm$ 2%
of the anthracene light output. There is a potential to improve this value in
the future by the optimization of the additives concentrations.
