Itraconazole Hydroxy Isopropyltriazolone Impurity

4-(4-(4-(4-Hydroxyphenyl)piperazin-1-yl)phenyl)-2-isopropyl-2,4-dihydro-3H-1,2,4-triazol-3-one; 3H-1,2,4-Triazol-3-one, 
2,4-dihydro-4-[4-[4-(4-hydroxyphenyl)-1-piperazinyl]phenyl]-2-(1-methylethyl); 2,4-Dihydro-4-[4-[4-(4-hydroxyphenyl)-1-piperazinyl]phenyl]-2-(1-methylethyl)-3H-1,2,4-triazol-3-one;