Results 251 to 260 of about 12,700 (282)

Pyrimidine, Purine, Pterine [PDF]

, 1958
Die in diesem Kapitel zusammengefassten Verbindungen zeichnen sich durch einen relativ hohen Stickstoffgehalt aus.
openaire   +1 more source

Some of the next articles are maybe not open access.

Related searches:

Inborn Errors of Pterin Metabolism

Annual Review of Nutrition, 1988
HY PERPHENY LALANINEMIA DUE TO TETRAHYDROBIOPTERIN DEFICIENCy 188 GTP Cyclohydrolase I Deficiency 188 6-Pyruvoyl Tetrahydropterin Synthase Deficiency 189 Dihydropteridine Reductase Deficiency 191 Other Forms ...
openaire   +3 more sources

The Synthesis of Fluorine-Containing Pterins

1993
The introduction of fluorine into molecules has been well demonstrated to modify the biological properties significantly1. In heterocyclic compounds this effect is clearly demonstrated through the action of 5-fluorouracil and its nucleosides as inhibitors of thymidylate synthetase.
Colin L. Gibson, Weifan Xing, Colin J. Suckling, Caroline Dunn   +3 more
openaire   +3 more sources

ChemInform Abstract: The Synthesis of Fluorine‐Containing Pterins. [PDF]

ChemInform, 1996
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Colin J. Suckling, Colin L. Gibson, Caroline Dunn   +2 more
openaire   +2 more sources

Electronic relaxation pathways of the biologically relevant pterin chromophore.

Physical Chemistry, Chemical Physics - PCCP, 2017
Pterin derivatives are endogenous photosensitizers common to every biological kingdom and are involved in numerous photobiological processes for which they have received widespread attention. Despite the photobiological relevance of the pterin compounds,
R. DiScipio, R. Santiago, D. Taylor, C. Crespo-Hernández   +3 more
semanticscholar   +1 more source

Calcium pterin as an antitumor agent

International Journal of Pharmaceutics, 2004
A series of in vivo studies are reported that provide evidence for an immunologically mediated mechanism for the antitumor response from a calcium pterin (CaPterin) suspension. Strong antitumor efficacy was demonstrated in fully immunocompetent female C3H/HeN-MTV+ mice (retired breeders) presenting spontaneous mammary gland adenocarcinomas.
openaire   +3 more sources

Reactions of CO₂˙^–radicals with pterin and pterin-6-carboxylate ions

J. Chem. Soc., Perkin Trans. 2, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Mohsen Farahani, Parminder S. Surdhar, Yun Mao, Christian Schöneich, Klaus-Dieter Asmus, Scott Allen, David A. Armstrong   +6 more
openaire   +3 more sources

Photodynamic Effects of Pterin on HeLa Cells

Photochemistry and Photobiology, 2011
AbstractPterins, heterocyclic compounds widespread in biological systems, participate in relevant biological processes and are able to act as photosensitizers. In the present study, we ascertained that 2‐aminopteridin‐4(3H)‐one, abbreviated as Ptr, is readily incorporated into and/or onto cervical cancer cells (HeLa) and that these cells die upon UV‐A ...
Denofrio, M. Paula, Lorente, Carolina, Breitenbach, Thomas, Hatz, Sonja, Cabrerizo, Franco M., Thomas, Andres H., Ogilby, Peter Remsen   +6 more
openaire   +4 more sources

Regioselective Preparation of Pterin 6-Triflate and Its Application to 6-Substituted Pterin Synthesis

HETEROCYCLES, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Shizuaki Murata, Kazunari Kudoh, Masato Kujime   +2 more
openaire   +3 more sources

Synthese einiger Pterine

Helvetica Chimica Acta, 1948
AbstractDie Herstellung folgender Pterine wird beschrieben: 2‐Äthyl‐thio‐6‐oxypteridin, 2‐Äthylthio‐6‐oxy‐8,9‐diphenylpteridin, 2‐Äthyl‐thio‐6‐oxy‐8,9‐dimethylpteridin, 2‐Äthylthio‐6‐oxy‐8,9‐phenanthreno‐pteridin, 2‐Äthylthio‐6‐oxy‐8,9‐acenaphtenopteridin, 6‐Amino‐iso‐xanthopterin‐carbonsäure, Desimino‐isoxanthopterincarbonsäure.
openaire   +2 more sources