Table 2.

Substitution scheme of compounds 36–41.

Compound		Substituent
		R1	R2
36		3′-(CF3)-Phenyl	3″-(CF3)-benzoyl
37		3′-(Cl)-Phenyl	3″-(Cl)-benzoyl
38		3′-(OCH3)-Phenyl	3″-(OCH3)-benzoyl
39		4′-(F)-Phenyl	4′-(F)-benzoyl
40		4′-(NO2)-Phenyl	4′-(NO2)-benzoyl
41		4′-(OCH3)-Phenyl	4′-(OCH3)-benzoyl