Electrogenerated chemiluminescence derivatization reagent, 3-Isobutyl-9,10-dimethoxy-1,3,4,6,7,11b- hexahydro-2H-pyrido[2,1-a]isoquinolin-2-ylamine, for carboxylic acid in high-performance liquid chromatography using tris(2,2-bipyridine)ruthenium(II) - Morita, Hirotoshi.