prov:value
| - A liquid crystal composition according to claim 1, wherein R' is an aryl group having a substituent, and wherein said substituent is a phenyl group, an alkylphenyl group, an alkoxyphenyl group, an alkyl group, an alkoxy group, a cycloalkyl group, an alkylcyclohexyl group, an acyloxy group, an acylamino group, a sulfonyloxy group, a sulfonamide group, a group of a carboxylic acid ester, a carbamoyl
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