| abstract |
The invention relates to compounds of the formula I, and a liquid-crystalline medium, preferably having a nematic phase and a negative dielectric anisotropy, which a) one or more compounds of the formula I. and b) one or more compounds of the formula II wherein the parameters have the respective meanings given in claim 1, includes its use in an electro-optic display, especially in an active matrix display based on the VA, ECB, PALC, FFS or IPS effect, such displays containing such a liquid-crystalline medium and the use of the compounds of formula I, for stabilizing a liquid-crystalline medium containing one or more compounds of formula II. |