Product name	Code	CAS No.	Structure of impurities
(2-Amino-3,5 -dibromophenyl) methanol	Ambroxol hydrochloride's impurity A	50739-76-9
Trans-4-(6,8- dibromo-1,4- dihydroquinazolin -3(2H)yl) cyclohexanol	Ambroxol hydrochloride's impurity B	15942-08-2
Trans-4- [[2-amino-3,5 dibromobenzyliden] amino] Cyclohexanol	Ambroxol hydrochloride's impurity C	50910-53-7
Cis-4- [(2-amino-3,5- dibromobenzyl) amino] Cyclohexanol	Ambroxol hydrochloride's impurity D	107814-37-9
2-Amino-3,5- dibromobenzaldehyde	Ambroxol hydrochloride's impurity E	50910-55-9

Product name	Code	CAS No.	Structure of impurities
N-(4,5-dihydro-1H-imidazol-2-yl)quinoxalin-6-amine	Brimonidine d-tartrate's impurity A	91147-43-2
6-Amino-5-bromoquinoxaline	Brimonidine d-tartrate's impurity B	50358-63-9
6-Aminoquinoxaline	Brimonidine d-tartrate's impurity C	6298-37-9
5-Bromoquinazolin-6-ylthiourea	Brimonidine d-tartrate's impurity D	842138-74-3
5-Bromo-6-guanidinoquinoxaline	Brimonidine d-tartrate's impurity E	168329-48-4
4,5-Didehydro brimonidine	Brimonidine d-tartrate's impurity F	151110-15-5
1-(2-Aminoethyl)-3-(5-bromoquinoxalin-6-yl)urea	Brimonidine d-tartrate's impurity G	1216379-05-3

Product name	Code	CAS No.	Structure of impurities
(2Z,4E,6E,8E)-9-(4-methoxy-2,3,6-trimethylphenyl)-3,7-dimethylnona-2,4,6,8-tetraenoic acid	Acitretin's impurity A	69427-46-9
Ethyl (all-E)-9-(4-methoxy-2,3,6-trimethylphenyl)-3,7-dimethylnona-2,4,6,8-tetraenoate	Acitretin's impurity B	54350-48-0