Bisthiourea-1;CHLORIDE IONOPHORE IV SELECTOPHORE;2,7-Di-tert-butyl-9,9-dimethyl-4,5-bis(N'-n-butyl-thioureido)xanthene;1-butyl-3-[2,7-ditert-butyl-5-(butylcarbamothioylamino)-9,9-dimethylxanthen-4-yl]thiourea;Thiourea, N,N''-[2,7-bis(1,1-dimethylethyl)-9,9-dimethyl-9H-xanthene-4,5-diyl]bis[N'-butyl-
