Ambroxol Impurity 8(Ambroxol Impurity M) 4-(2-amino-3,5-dibromobenzylamino)cyclohexanone Cyclohexanone, 4-[[(2-amino-3,5-dibromophenyl)methyl]amino]- 4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol 4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol 4-((2-amino-3,5-dibromobenzyl)amino)cyclohexan-1-one 4-[[(2-Amino-3,5-dibromophenyl)methylene]amino]cyclohexanol 4-((2-amino-3,5-dibromobenzyl)amino)cyclohexan-1-one hydrochloride Ambroxol Impurity 8（Ambroxol Impurity