U. Girreser

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Characterization of biguanides by 15N NMR spectroscopy

B. Clement, U. Girreser, 1999 .

Separation and structural characterization of the synthetic cannabinoids JWH-412 and 1-[(5-fluoropentyl)-1H-indol-3yl]-(4-methylnaphthalen-1-yl)methanone using GC-MS, NMR analysis and a flash chromatography system.

V. Brecht, V. Auwärter, U. Girreser, 2012, Forensic science international.

Insights into polyamine metabolism: homospermidine is double-oxidized in two discrete steps by a single copper-containing amine oxidase in pyrrolizidine alkaloid biosynthesis.

Christian Sievert, D. Ober, M. Nimtz, 2022, The Plant cell.

Characterization of para‐substituted benzamidoximes and benzamidinium salts by 15N NMR spectroscopy

B. Clement, U. Girreser, M. König, 2002 .

Phenylpropanoid and flavonoid glycosides from the leaves of Clerodendrum infortunatum (Lamiaceae)

Md. Josim Uddin, F. Sönnichsen, M. A. Abdalla, 2020 .

Lignans and sesquiterpene lactones from Hypochaeris radicata subsp. neapolitana (Asteraceae, Cichorieae).

R. Greil, C. van Thriel, K. Jöhrer, 2019, Phytochemistry.

Structure elucidation of the designer drug N-(1-amino-3,3-dimethyl-1-oxobutan-2-yl)-1-(5-fluoropentyl)-3-(4-fluorophenyl)-pyrazole-5-carboxamide and the relevance of predicted (13) C NMR shifts - a case study.

U. Girreser, P. Rösner, A. Vasilev, 2016, Drug testing and analysis.

Detoxification of Trimethylamine N-Oxide by the Mitochondrial Amidoxime Reducing Component mARC.

F. Bittner, B. Clement, U. Girreser, 2018, Chemical research in toxicology.

1H, 13C and 15N NMR spectral analysis of substituted 1,2,3,4‐tetrahydro‐pyrido[1,2‐a]pyrimidines

B. Clement, U. Girreser, D. Heber, 2013, Magnetic resonance in chemistry : MRC.

Synthesis of p-amino-N,N′-dihydroxybenzamidine using a TBDMS protecting group protocol

B. Clement, U. Girreser, Laura Schwarz, 2014 .

Synthesis and Characterization of para-Substituted N,N′-Dihydroxybenzamidines and Their Derivatives as Model Compounds for a Class of Prodrugs

B. Clement, U. Girreser, Laura Schwarz, 2014 .

Synthesis and Characterization of para‐Substituted N,N′‐Dihydroxybenzamidines and Their Derivatives as Model Compounds for a Class of Prodrugs.

B. Clement, U. Girreser, Laura Schwarz, 2015 .

Synthesis of p‐Amino‐N,N′‐dihydroxybenzamidine Using a TBDMS Protecting Group Protocol.

B. Clement, U. Girreser, Laura Schwarz, 2014 .

Benzophenones and flavonoids from Hypericum maculatum and their antioxidant activities

U. Girreser, D. Zheleva-Dimitrova, P. Nedialkov, 2012, Natural product research.

Benzophenone O-glycosides from Hypericum elegans

U. Girreser, D. Zheleva-Dimitrova, P. Nedialkov, 2009, Natural product research.

Cytotoxic effects of hyperatomarin, a prenylated phloroglucinol from Hypericum annulatum Moris subsp. annulatum, in a panel of malignant cell lines.

D. Ferdinandov, G. Momekov, U. Girreser, 2008, Phytomedicine : international journal of phytotherapy and phytopharmacology.

A new isocoumarin from Hypericum annulatum

U. Girreser, D. Zheleva-Dimitrova, P. Nedialkov, 2007, Natural product research.

Structure elucidation of a new designer benzylpiperazine: 4-bromo-2,5-dimethoxybenzylpiperazine.

U. Girreser, F. Westphal, T. Junge, 2009, Forensic science international.

Structure elucidation designer benzylpiperazine: 4-bromo-2,5-dimethoxybenzylpiperazine

U. Girreser, F. Westphal, T. Junge, 2009 .

Polylithiumorganic compounds: Part 28. The reaction of allene and alkyl substituted allenes with lithium metal

U. Girreser, A. Maercker, Andrea Tatai, 2002 .

The Reaction of Substituted Vinylsilanes with Lithium Metal

U. Girreser, A. Maercker, Kerstin Reider, 1998 .

Polylithiumorganic compounds - 20.

U. Girreser, A. Maercker, 1994 .

11‐Substituted Benzo[c]phenanthridines: New Structures and Insight into Their Mode of Antiproliferative Action

D. Marko, B. Clement, C. Meier, 2016, ChemMedChem.

One-Step Synthetic Access to Isosteric and Potent Anticancer Nitrogen Heterocycles with the Benzo[c]phenanthridine Scaffold.

M. Cushman, B. Clement, C. Meier, 2016, Chemistry.

Triggering the directional selectivity of a ring-closure reaction leads to pyridoazacarbazoles with anticancer properties.

B. Clement, C. Meier, D. Längle, 2015, Chemistry.

Synthesis of 6-substituted 7-aryl-5,6-dihydropyrido[2,3-d]pyrimidine(1H,3H)-2,4-diones using the Vilsmeier reaction

U. Girreser, D. Heber, Martin Schütt, 2004 .

Two-Step Synthetic Approach to 6-Substituted Pyrido[2,3-d]pyrimidine(1H,3H)-2,4-diones from 6-Amino-, 6-Alkylamino-, and 6-Arylamino-1,3-dimethyluracils

U. Girreser, D. Heber, Martin Schütt, 2006 .

Polylithiumorganic compounds — 23. 3,4-Dilithio-1,2-butadienes by addition of lithium metal to 1,4-unsymmetrically substituted butatrienes☆

U. Girreser, A. Maercker, H. Wunderlich, 1996 .

A Facile One-Pot Synthesis of 1-Aryl-2-(dimethylaminomethyl)prop-2-en-1-ones from Aryl Methyl Ketones.

U. Girreser, D. Heber, Martin Schuett, 1998 .

A Facile One-Pot Synthesis of 1-Aryl-2-(dimethylaminomethyl)prop-2-en-1-ones from Aryl Methyl Ketones

U. Girreser, D. Heber, Martin Schütt, 1998 .

Vicinal Dilithioalkenes by Addition of Lithium to Simple Cyclic and Acyclic Alkynes

T. Graule, U. Girreser, A. Maercker, 1986 .

3-Benzoyl-3,4-dihydro-2H,5H-1-benzopyrano[4,3-b]pyran-5-ones by condensation of 4-hydroxycoumarins with enone mannich bases

U. Girreser, D. Heber, Martin Schütt, 1998 .

Polylithiumorganic compounds. Part 29: C,C Bond cleavage of phenyl substituted and strained carbocycles using lithium metal

U. Girreser, A. Maercker, Kristian S. Oeffner, 2004 .

Polylithiumorganic Compounds. Part 27: C,C-Bond Forming Reactions of 3,4-Dilithio-2,5-dimethyl-2,4-hexadiene

U. Girreser, A. Maercker, Joachim van de Flierdt, 2000 .

Reductive Scission of a Cyclopropane σ‐Bond During the Action of Elemental Lithium on Cyclopropylacetylenes – A cis‐1,2‐Dilithioalkene as Intermediate

U. Girreser, A. Maercker, 1990 .

Axitinib: A Photoswitchable Approved Tyrosine Kinase Inhibitor

B. Hartke, Tim Raeker, M. Kriegs, 2018, ChemMedChem.

Biological Activities of Two Major Copaiba Diterpenoids and Their Semi-synthetic Derivatives

D. Taşdemir, A. Wenzel-Storjohann, U. Girreser, 2020, Revista Brasileira de Farmacognosia.

POLYLITHIUMORGANIC COMPOUNDS, 24. THE REACTION OF SUBSTITUTED VINYLSILANESWITH LITHIUM METAL

U. Girreser, A. Maercker, Kerstin Reider, 1998 .

O,O-Acetal Formation of exo-Annelated Octahydro-7,8,8-trimethyl-4,7-methanobenzofuran-2-ol with Lactic Acid and Phenyllactic Acid Derivatives

C. Noe, G. Haberhauer, U. Girreser, 1998 .

Controlled Rearrangement of 2,3‐Dilithio‐1,3‐butadienes to 2,5‐Dilithio‐1,3‐butadienes: Synthesis of 2‐Isopropylidene‐2,5‐dihydrosilols

U. Girreser, A. Maercker, H. Wunderlich, 1998 .

CIS-1,2-DILITHIOCYCLOOCTENE

T. Graule, U. Girreser, A. Maercker, 1988 .

Polylithiumorganic Compounds. Part 20. Stereoselective Synthesis of Vicinal Dilithioalkenes by Addition of Lithium Metal to Carbon-Carbon Triple Bonds.

U. Girreser, A. Maercker, 1994 .

2,2′-Dilithio-1,1′-bicyclooctenyl: Synthesis and reactions with electrophiles

U. Girreser, A. Maercker, 1994 .

The regioselective generation of arynes from polyhalogenobenzenes. An improved synthesis of syn- and anti-1,4,5,8,9,12-hexahydro-1,4: 5,8:9,12-triepoxytriphenylene

F. Raymo, J. Stoddart, U. Girreser, 1992 .

Electrochemical and mARC‐Catalyzed Enzymatic Reduction of para‐Substituted Benzamidoximes: Consequences for the Prodrug Concept “Amidoximes instead of Amidines”

F. Bittner, R. Mendel, Philipp Kurz, 2015, ChemMedChem.

Quality control of Aloe vera (Aloe barbadensis) and Aloe ferox using band-selective quantitative heteronuclear single quantum correlation spectroscopy (bs-qHSQC).

U. Girreser, S. Çiçek, T. Ugolini, 2019, Talanta.

Oxidation and Degradation Products of Papaverine, Part II[1]: Investigations on the Photochemical Degradation of Papaverine Solutions

K. Piotrowska, T. Hermann, U. Girreser, 2003, Archiv der Pharmazie.

Biosynthesis of the orthosomycin antibiotic avilamycin A: deductions from the molecular analysis of the avi biosynthetic gene cluster of Streptomyces viridochromogenes Tü57 and production of new antibiotics.

G. Jung, D. Hoffmeister, R. Süssmuth, 2001, Chemistry & biology.

Antimicrobial Prenylated Isoflavones from the Leaves of the Amazonian Medicinal Plant Vatairea guianensis Aubl.

D. Taşdemir, A. Wenzel-Storjohann, U. Girreser, 2022, Journal of natural products.

Molecular belts. 2. Substrate-directed syntheses of belt-type and cage-type structures

David J. Williams, J. F. Stoddart, F. Raymo, 1993 .

Determination of Total Sennosides and Sennosides A, B, and A1 in Senna Leaflets, Pods, and Tablets by Two-Dimensional qNMR

U. Girreser, S. Çiçek, Calisto Moreno Cardenas, 2022, Molecules.

Molecular Belts. Part 2. Substrate-Directed Syntheses of Belt-Type and Cage-Type Structures.

J. F. Stoddart, F. Raymo, J. Mathias, 1993 .

Electron ionisation mass spectral study of 2-(2-carboxy-4, 5-dimethoxyphenyl)-6,7-dimethoxyisoquinolinium inner salt.

A. Czyrski, T. Hermann, U. Girreser, 2009, Die Pharmazie.

Oxygen-insensitive enzymatic reduction of oximes to imines.

B. Clement, Bernd Clement, U. Girreser, 2006, Biochemical pharmacology.

Structure elucidation of a new open chain isomer of the cannabimimetic cyclopropoylindole A-796,260.

U. Girreser, F. Westphal, S. Knecht, 2014, Forensic science international.

Mass, NMR and IR spectroscopic characterization of pentedrone and pentylone and identification of their isocathinone by-products.

U. Girreser, F. Westphal, W. Greibl, 2012, Forensic science international.

Spectroscopic characterization of 3,4-methylenedioxypyrrolidinobutyrophenone: a new designer drug with α-pyrrolidinophenone structure.

U. Girreser, F. Westphal, T. Junge, 2011, Forensic science international.

Mass spectral and NMR spectral data of two new designer drugs with an α-aminophenone structure: 4′-Methyl-α-pyrrolidinohexanophenone and 4′-methyl-α-pyrrolidinobutyrophenone

U. Girreser, F. Westphal, T. Junge, 2007 .

A refined characterisation of the NeoHepatocyte phenotype necessitates a reappraisal of the transdifferentiation hypothesis.

James A. Hutchinson, J. Hengstler, A. Nüssler, 2009, Differentiation; research in biological diversity.

Synthesis, Characterization and NO Synthase Inhibition Testing of 2‐Aryl‐5‐aroyl‐3,4,5,6‐tetrahydropyrimidinium Chlorides

J. Boucher, B. Clement, U. Girreser, 2015 .

Synthesis and evaluation of pyrido[1,2-a]pyrimidines as inhibitors of nitric oxide synthases.

J. Boucher, B. Clement, U. Girreser, 2009, European journal of medicinal chemistry.

Prediction of the sweetening effect of Siraitia grosvenorii (luo han guo) fruits by two-dimensional quantitative NMR.

U. Girreser, S. Çiçek, Tiffany Esposito, 2020, Food chemistry.

N-7-Guanine Adduct of the Active Monoepoxide of Prodrug Treosulfan: First Synthesis, Characterization, and Decomposition Profile Under Physiological Conditions.

F. Główka, Michał Romański, U. Girreser, 2018, Journal of pharmaceutical sciences.

Synthesis and physicochemical characterization of novel 6-aminopyrido[3,4-c][1,9]phenanthrolines as aza-analogs of benzo[c]phenanthridines

B. Clement, C. Meier, U. Girreser, 2012 .

Metabolism of benzamidoxime (N-hydroxyamidine) in human hepatocytes and role of UDP-glucuronosyltransferases

B. Clement, U. Girreser, A. Fröhlich, 2005, Xenobiotica; the fate of foreign compounds in biological systems.

THE SYNTHETIC POTENTIAL OF ENONE MANNICH BASES FOR THE SYNTHESIS OF NOVEL 5-BENZOYL-1,4,5,6-TETRAHYDROPYRIMIDINES

U. Girreser, D. Heber, Martin Schütt, 1999 .

Cytoprotective and antioxidant effects of phenolic compounds from Haberlea rhodopensis Friv. (Gesneriaceae)

M. Mitcheva, U. Girreser, D. Zheleva-Dimitrova, 2013, Pharmacognosy magazine.

A Dual Topoisomerase Inhibitor of Intense Pro‐Apoptotic and Antileukemic Nature for Cancer Treatment

A. Vollmar, Katharina Jarolim, D. Marko, 2017, ChemMedChem.

Isomeric fluoro-methoxy-phenylalkylamines: a new series of controlled-substance analogues (designer drugs).

U. Girreser, T. Junge, P. Rösner, 2005, Forensic science international.

Analytical characterization of four new ortho-methoxybenzylated amphetamine-type designer drugs.

U. Girreser, F. Westphal, Delia Waldmüller, 2016, Drug testing and analysis.

Phase 2 metabolites of N-hydroxylated amidines (amidoximes): synthesis, in vitro formation by pig hepatocytes, and mutagenicity testing.

B. Clement, U. Girreser, K. Christiansen, 2001, Chemical research in toxicology.

Two-dimensional qNMR of anthraquinones in Frangula alnus (Rhamnus frangula) using surrogate standards and delay time adaption.

U. Girreser, S. Çiçek, T. Ugolini, 2019, Analytica chimica acta.

Flavonoids and a xanthone from Hypericum umbellatum (Guttiferae)

U. Girreser, D. Zheleva-Dimitrova, P. Nedialkov, 2007 .

Quantification of diterpene acids in copaiba oleoresin by UHPLC-ELSD and heteronuclear two-dimensional qNMR

U. Girreser, S. Çiçek, Anna Laís Pfeifer Barbosa, 2018, Planta Medica.

Quantification of the total amount of black cohosh cycloartanoids by integration of one specific 1H NMR signal

C. Zidorn, U. Girreser, S. Çiçek, 2018, Journal of pharmaceutical and biomedical analysis.

The COVID‐19 vaccine ChAdOx1‐S is not contaminated with sulfated glycosaminoglycans

A. Greinacher, F. Sönnichsen, S. Alban, 2021, Journal of Thrombosis and Haemostasis.

Design, Synthesis, and Bioactivation of O-Glycosylated Prodrugs of the Natural Nitric Oxide Precursor N(ω)-Hydroxy-l-arginine.

D. Schade, B. Clement, U. Girreser, 2016, Journal of medicinal chemistry.

An Efficient Synthesis of Optically Pure N δ-Monomethylated l-Arginine and l-Ornithine

D. Schade, B. Clement, U. Girreser, 2016, Synthesis.

Bromoanaindolone, a novel antimicrobial exometabolite from the cyanobacterium Anabaena constricta

H. Laatsch, U. Girreser, M. Al‐Refai, 2009, Natural product research.

Elucidation of the function of two glycosyltransferase genes (lanGT1 and lanGT4) involved in landomycin biosynthesis and generation of new oligosaccharide antibiotics.

J. Rohr, A. Bechthold, A. Trefzer, 2001, Chemistry & biology.

The structure-directed synthesis of cyclacene and polyacene derivatives

J. F. Stoddart, J. Mathias, D. Philp, 1993 .

METABOLISM OF N-HYDROXYGUANIDINES (N-HYDROXYDEBRISOQUINE) IN HUMAN AND PORCINE HEPATOCYTES: REDUCTION AND FORMATION OF GLUCURONIDES

B. Clement, U. Girreser, A. Froehlich, 2005, Drug Metabolism and Disposition.

Quantitation of Formoterol, Salbutamol, and Salbutamol-4′- O-Sulfate in Human Urine and Serum via UHPLC-MS/MS

M. Zügel, D. Bizjak, M. Parr, 2023 .

Elegaphenone and 7-epi-clusianone, the major cytotoxic constituents of Hypericum elegans

U. Girreser, D. Zheleva-Dimitrova, P. Nedialkov, 2011, Natural product research.

Metabolism of cytostatically active 6-aminobenzo[c]phenanthridines by human and porcine hepatic microsomes and recombinant cytochrome P450 enzymes

B. Clement, U. Girreser, I. Zebothsen, 2006, Xenobiotica; the fate of foreign compounds in biological systems.

Synthesis and structure elucidation of a new isoquinolinium inner salt

A. Czyrski, T. Hermann, U. Girreser, 2009 .

15N NMR chemical shifts in papaverine decomposition products

A. Czyrski, T. Hermann, U. Girreser, 2013 .

Cytotoxic constituents and a new hydroxycinnamic acid derivative from Leontodon saxatilis (Asteraceae, Cichorieae)

R. Greil, F. Sönnichsen, K. Jöhrer, 2021, RSC advances.

UHPLC-ELSD and heteronuclear two-dimensional qNMR

U. Girreser, S. Çiçek, A. L. P. Barbosa, 2020 .

Analytical characterization of four new ortho-methoxybenzylated amphetamine-type designer drugs.

U. Girreser, F. Westphal, Delia Waldmüller, 2016, Drug testing and analysis.