The development of a radiochemical enzyme assay for p‐octopamine in 1969 led to its
identification in a large number of invertebrate nerve systems and in mammalian sympathetic …

The Isomeric octopamines and synephrines were measured In urine by a new assay which
combines Ion-exchange chromatography, capillary column gas chromatography, and …

Eleven mass spectra of biologically important tryptamines and their acetylated derivatives
are recorded in this paper. For diagnostic purposes, the N-acetyltryptamines are preferred …

MATERIALS AND METhODS Radiopharmaceutical Iodine-125 SCH 23982 (R-(+)-8-['251]
iodo-7-hydroxy 2, 3, 4, 5-tetrahydro-3-methyl-5-phenyl-lH-3-benzazepine) in 50% n-propanol, …

PD, the previouslyobserved inverse correlationbetween levodopadosageand D2-receptordensityappearsto
be most prominentin the leastdopamine-deplatedregion, ventralcau date. …

… However, the molecular weight of the derivatives of both monohydroxy acids is 262 so that
interference with the ions m/z 315 … CM Williams and MW Couch, Life Sci. 22, 2113 (1978). 2. …

It has been shown that there is no significant carrier effect when low levels of [ 3 H]octopamine
(100 pg) are extracted by ethyl acetate from aqueous solutions containing a 10 3 or 10 6 …

Ortho - and meta - octopamine have been identified in beef and rat adrenal gland and in rat
salivary gland by means of gas chromatography-mass spectrometry. The tritrifluoroacetyl …

… identification of low molecular weight compounds present in … the mass spectrometry of low
molecular weight aromatic amines of … patterns of low molecular weight aromatic amines was …

Gas chromatography‐mass spectrometry‐selected ion monitoring has been used to identify
m‐synephrine (phenylephrine) in bovine adrenal gland. After ion exchange chromatography…