Abstract: The new compounds produced from a molecular structural element with two chirality centers and at least one mesogenic structural element are defined by the general formula (I) ##STR1## in which the symbols have the following meaning: Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4 = in any two cases (a) hydroxy and MC--CO--O or, independently of each other, MC--CO--O and (b), independently of each other (C.sub.1 -C.sub.10)alkoxy, MC denoting the molecular radical of a mesogenic carboxylic acid after splitting off a COOH group, and it being possible for Y.sup.2 and Y.sup.3, in the case of (C.sub.1 -C.sub.10)alkoxy, also to be jointly part of a dioxolane ring, or Y.sup.1 and Y.sup.4 jointly = 0 as part of a tetrahydrofuran ring, and Y.sup.2 and Y.sup.3 = hydroxy and MC--CO--O or, independently of each other, MC--CO--O. Said esters preferably find application as dopants in twistable liquid crystal phases in which they produce temperature compensation and twisting.

Abstract: The new compounds produced from a molecular structural element with two chirality centers and at least one mesogenic structural element are defined by the general formula (I) ##STR1## in which the symbols have the following meaning: Y.sup.1 =H, (C.sub.1 -C.sub.10)alkyl, MC--CH.sub.2 or MC--CO, MC denoting the molecular radical of a mesogenic carboxylic acid after splitting off a COOH group,Y.sup.2 =(C.sub.1 -C.sub.10)alkyl, MC--CH.sub.2 or MC--CO, it being possible for Y.sup.1 and Y.sup.2 to jointly represent a MC--CH group, which is then part of a dioxolane ring,X=COOR.sup.1, CONH.sub.2, CONR.sup.2 R.sup.3 or C.tbd.N,R.sup.1 =(C.sub.1 -C.sub.10)alkyl or MC--CH.sub.2, andR.sup.2, R.sup.3 =H and (C.sub.1 -C.sub.4)alkyl or, independently of each other, (C.sub.1 -C.sub.4)alkyl.Said esters preferably find application as dopants in twistable liquid crystal phases in which they produce temperature compensation and twisting.