Brimonidine59803-98-4100 % similar Brimonidine tartrate70359-46-575 % similar 6-Amino-5-bromoquinoxaline50358-63-940 % similar Tizanidine51322-75-940 % similar Tizanidine hydrochloride64461-82-138 % similar Clonidine4205-90-738 % similar Clonidine hydrochloride4205-91-835 % similar Apraclonidine66711-21-532 % similar Bisantrene78186-34-231 % similar Apraclonidine hydrochloride73218-79-830 % similar