Ketotifen Impurity C

?Itraconazole EP Impurity E ; trans-Itraconazole ; 4-[4-[4-[4-[[trans-2-(2, 4-Dichlorophenyl)-2-(1H-1, 2, 4-triazol-1-ylmethyl)-1, 3-dioxolan-4-yl]methoxy]phenyl]piperazin-1-yl]phenyl]-2-[(1RS)-1-methylpropyl]-2, 4-dihydro-3H-1, 2, 4-triazol-3-one ;