| 摘要 |
The invention relates to compounds of the formula I in which R0, A0, A1, A2, Z0, Z1, Z2, L1, L2, X, l, m and n have the meanings indicated in claim 1, and to the use thereof in liquid-crystalline media, and to liquid-crystalline media comprising one or more compounds of the formula I in electro-optical liquid-crystal displays. |
