Strong products of our company.Can supply USP and BP standard with competitive price.GMP and DMF available Chemical name:2-(2-Carboxyethyl)-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium benzenesulfonate pentamethylene ester; N,N'-Dimethyl-N,N'-(4,10-dioxa-3,11-dioxotridecylene)-1,13-bis-tetrahydropapaverinium dibenzenesulfonate; 2,2'-[1,5-Pentanediylbis Cas no.:64228-81-5 ...