the chromatographic behavior of norepinephrine ( ne ) , epinephrine , dopamine , 3,4-dihydroxyphenylalanine , and 3,4-dihydroxyphenylacetic acid on octylsilane ( c8 ) reversed-phase high-performance liquid chromatography columns was observed under various mobile phase conditions including manipulations of ph , pairing ion and methanol concentrations .
C0028351
norepinephrine
C0014563
epinephrine