Not Less Than - 95%
1-(3-Hydroxymethyl-2-pyridyl)-4-methyl-2-phenylpiperazine; 1-[3-(Hydroxymethyl)pyridin-2-yl)-4-methyl-2-phenylpiperazine; 2-(4-Methyl-2-phenylpiperazin-1-yl)pyridine-3-methanol; Mirtazapine USP Impurity B; Acyclomirtazapine alcohol; (2-(4-Methyl-2-phenylpiperazin-1-yl)pyridin-3-yl)methanol (USP);