| abstract |
The invention relates to compounds of formula I; and to liquid-crystalline media, preferably having a nematic phase and negative dielectric anisotropy, comprising a) one or more compounds of formula I and b) one or more compounds of formula II wherein the parameters have the respective meanings indicated in claim 1; relate to their use in electro-optic displays, in particular active matrix displays based on VA, ECB, PALC, FFS or IPS effects; relate to such types comprising such liquid crystal media Displays; and to the use of compounds of formula I for stabilizing liquid crystal media containing one or more compounds of formula II. |