Chemical Name: (1R,2R)-2-(2-Carboxyethyl)-1-[(3,4-dimethoxyphenyl)-methyl]-6,7-dimethoxy-2-methyl-1,2,3,4-tetrahydroisoquinolinium Iodide (as per EP); (1R,2R)-2-(2-Carboxyethyl)-1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-1-veratrylisoquinolinium Iodide (as per USP)