Liquid-crystalline medium

A liquid-crystalline medium, comprising one or more compounds of Formula I

• in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meaning:
• R0 an alkyl group having 1 to 12 C atoms or an alkenyl group having 2 to 12 C atoms in which one or more CH2 groups are optionally substituted by —C≡C—, —CF2O—, —OCF2—, —CH═CH—,
• —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom;
• X0 a halogen atom, —CN, —SCN, —NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom;
• L1 and L2 each, independently of one another, H, F or C, wherein L1 and L2 do not simultaneously denote H;
• Y0 H or CH3;
• one or more antioxidant and, optionally,
• one or more light stabilizer.