335081-04-4Relevant articles and documents
PROBE FOR MULTIPLE RESONANCE
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Paragraph 0092; 0093; 0096, (2016/12/16)
PROBLEM TO BE SOLVED: To provide a precursor amino acid of a neurotransmitter capable of showing a physiologic activity or a pharmacological activity as a precursor of neurotransmitter and being detected at high selectivity in organism and to provide a probe for multiple resonance showing the physiologic activity or the pharmacological activity as the precursor of neurotransmitter and being tracked a process of metabolic reactions in organism and further being detected at high selectivity in organism. SOLUTION: There is provided a precursor amino acid of neurotransmitter represented by the formula (I), where R1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms which may have a substituent, an aryl group having 6 to 12 carbon atoms which may have a substituent, a heterocyclic group having 3 to 10 carbon atoms which may have a substituent or a carboxylic group, or a probe for multiple resonance containing the precursor amino acid of neurotransmitter as an active ingredient. COPYRIGHT: (C)2015,JPOandINPIT
Synthesis of Dopamines Labelled with 13C in the α- or β-Side Chain Position and Their Application to Structural Studies on Melanins by Solid-State NMR Spectroscopy
Crescenzi, Orlando,Kroesche, Christoph,Hoffbauer, Wilfried,Jansen, Martin,Napolitano, Alessandra,et al.
, p. 563 - 568 (2007/10/02)
Solid-state NMR spectroscopy was applied to the analysis of melanins prepared by peroxidase-H2O2 oxidation of dopamines specifically 13C labelled in the α- or β-side chain positions.A surprisingly diverse pattern of signals indicated the presence of uncyclized dopamine and noradrenaline-derived units, in addition to indole and carbonyl carbon atoms.These structural features, coupled with the results obtained from elemental analysis of dopamine melanin samples prepared under different conditions, point to a pigment formation process more complex than previously believed. - Key Words: CP-MAS NMR Spectroscopy / Melanin / Oxidative phenolic coupling / Quinone methides / Labelled compounds, 13C / Dopamines / Enzymes