Cetirizine Impurity 78

1,3-dihydroxypropan-2-yl 2- (2- (4- ((4-chlorophenyl) (phenyl) methyl) piperazin-1-yl) ethoxy) acetate--2,3-dihydroxypropyl 2- (2- (4- ((4-chlorophenyl) (phenyl) methyl) piperazin-1-yl) ethoxy) acetate (1/1)