Liquid-crystalline medium and liquid crystal display

A liquid-crystalline medium comprising one or more compounds of formula I:

• in which
• R0 denotes an alkyl or alkoxy radical having 1 to 15 C atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CF2O—, —CH═CH—,
• —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and where, in addition, one or more H atoms are each optionally replaced by a halogen atom,
• X0 denotes F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical having up to 6 C atoms, a halogenated alkenyl radical having up to 6 C atoms, a halogenated alkoxy radical having up to 6 C atoms, or a halogenated alkenyloxy radical having up to 6 C atoms, and
• L1-6 each, independently of one another, denote H or F.