ifluoromethyl lower alkoxy, amino, acetamino or R1 R2 or R3 R4 R5, taken together with the phenyl group to which they are attached, form a naphthyl or substituted naphthyl group; and R is a straight chained, saturated or unsaturated hydrocarbon that contains 2-12 carbon atoms; with the provisos that: at least one of R1 and R2 is other than hydrogen where (i) R is (CH2)2 and (ii) R3, R4 and R5 are