Pyridinium, 1-[[3-chloro-4-[[[[3-[3,3-dibutyl-7-(dimethylamino)-2,3,4,5-tetrahydro-1,1- dioxido-1,4-benzothiazepin-5-yl]phenyl]amino]thioxomethyl]amino]phen yl]methyl]-4-phenyl-, bromide