| abstract |
The invention relates to compounds of the formula I, and to a liquid-ncrystalline medium, preferably having a nematic phase and negative ndielectric anisotropy, which comprises a) one or more compounds of the formula I n nand b) one or more compounds of the formula II n nin which the parameters have the respective meanings indicated in Claim 1, to the use thereof in an electro-optical display, particularly in an active-nmatrix display based on the VA, ECB, PALC, FFS or IPS effect, |