| abstract |
The compound represented by the general formula (i), which contains one or more compounds represented by the general formula (i) and contains one or more compounds represented by the general formula (ii) The content is 5 to 30%, and the content of the compound represented by the general formula (ii) is 5 to 25%. ( Wherein R i1 , R i2 and R ii1 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two non-adjacent two -CH 2 - groups in the alkyl group are independently -CH = CH -, -C≡C-, and optionally substituted by -O-, -CO-, -COO-, or -OCO-, X i6 i1 ~X is a hydrogen atom or a fluorine atom each independently, X is ii1 A hydrogen atom, a fluorine atom or a chlorine atom) |