there will now be explained a compound having alkyl groups at side chains str13 the compound may be synthesized as in the above synthetic process in association with those having alkoxyl groups at side chains except that reduction is carried out following acylation by friedel craft reaction and that alkylbenzene is used at preparation of a grignard reagent c a compound having an alkoxyl group and an alkyl group at two side chains separately may be synthesized as in item a described above except that selection is performed regarding whether reduction is carried out after acylation by friedel craft reaction or alkylbenzene is used at preparation of grignard reagent to introduce an alkoxyl group or an alkyl group at an appropriate side chain thereof d an example of synthesizing triphenyl compounds belonging to compound i is described below 4 bromo 2 fluorobiphenyl as a starting material is subjected to acylation by friedel craft reaction to convert it into 4 39 acyl 4 bromo 2 fluorobiphenyl which is then converted into a 4 39 hydroxybiphenyl compound the 4 39 hydroxybiphenyl compound is treated with alkyl halide rx to obtain a 4 39 alkoxybiphenyl compound on the other hand a grignard reagent having a benzene nucleus with a fluoro.