chloroform;3,5-dimethyl-2,6-bis(2-pyridyl)pyridine;2-methyl-5-[5-(6-methyl-1,1-dioxo-5-phenyl-4H-1,4-thiazin-3-yl)-1,1-dioxo-4H-1,4-thiazin-3-yl]-3-phenyl-4H-1,4-thiazine 1,1-dioxide