1,3,4-Oxadiazole-2(3H)-thione, 3-(((3,5-dichlorophenyl)amino)methyl)-5-(4-pyridinyl)- 3-(((3,5-Dichlorophenyl)amino)methyl)-5-(4-pyridinyl)-1,3,4-oxadiazole-2(3H)-thione 84249-82-1