Patent ID: 7393568

Claim:
A composition comprising at least one liquid crystal and at least one compound represented by a formula (I): wherein R 1 , R 2 , R 5 , R 6 and R 7 respectively represent a hydrogen atom or a substituent, provided that at least one of R 1 , R 2 , R 5 and R 6 represents a substituted or non-substituted alkyl group, cycloalkyl group, aryl group or heteroaryl group; R 3 and R 4 each represents —OH; S represents a sulfur atom, B 1 and B 2 respectively represent a substituted or non-substituted arylene group, heteroarylene group or divalent cyclic aliphatic hydrocarbon group; Q 1 represents a divalent linking group, C 1 represents a substituted or non-substituted alkyl group, cycloalkyl group, alkoxy group, alkoxycarbonyl group, acyl group or acyloxy group; p, q and r respectively represent an integer from 0 to 5 and n is an integer from 1 to 3, provided that (p+r)xn is from 3 to 10; when p, q or r is 2 or more, plural B 1 , Q 1 or B 2 may be the same or different from each other; and when n is 2 or more, plural {(B 1 ) p -(Q 1 ) q -(B 2 ) r }may be the same or different from each other.