A5065355884- Phytochemistry and Biological Activities
- Traditional and Medicinal Uses of Annonaceae
- Piperaceae Chemical and Biological Studies
- Biochemical Analysis and Sensing Techniques
- Natural product bioactivities and synthesis
- Plant-derived Lignans Synthesis and Bioactivity
- Alkaloids: synthesis and pharmacology
- Asymmetric Synthesis and Catalysis
- Biological Activity of Diterpenoids and Biflavonoids
- Plant biochemistry and biosynthesis
- Essential Oils and Antimicrobial Activity
- Chemical synthesis and alkaloids
- Botanical Research and Chemistry
- Phytochemistry and Bioactive Compounds
- Medicinal plant effects and applications
- Synthetic Organic Chemistry Methods
- Fungal Biology and Applications
- Molecular spectroscopy and chirality
- Advanced Synthetic Organic Chemistry
- Phytochemistry and biological activities of Ficus species
- Language Development and Disorders
- Security and Verification in Computing
- Axial and Atropisomeric Chirality Synthesis
- Autoimmune and Inflammatory Disorders
- Digital and Cyber Forensics
University of Newcastle Australia
2020
Norfolk and Norwich University Hospitals NHS Foundation Trust
2019
Defence Institute of Advanced Technology
2016
Mid Essex Hospital Services NHS Trust
2010
Broomfield Hospital
2008
Sandwell General Hospital
2004
Birmingham Children's Hospital
2004
University of Wisconsin–Madison
1998
Novartis (Switzerland)
1975
University of Zurich
1963-1975
The structure of mappicine, a minor alkaloid isolated from Mappia foetida Miers, has been established as (IIa){7-(1-hydroxypropyl)-8-methylindolizino[1,2-b]quinolin-9(11H)-one} by partial synthesis camptothecin (Ia).
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConstituents of Helenium Species. XIII. The Structure Helenalin and Mexicanin AWerner. Herz, A. Romo. de Vivar, J. Romo, N. ViswanathanCite this: Am. Chem. Soc. 1963, 85, 1, 19–26Publication Date (Print):January 1963Publication History Published online1 May 2002Published inissue 1 January 1963https://pubs.acs.org/doi/10.1021/ja00884a004https://doi.org/10.1021/ja00884a004research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of two triterpenes. Application partially relaxed Fourier transform carbon-13 nuclear magnetic resonanceK. Nakanishi, V. P. Gullo, I. Miura, T. R. Govindachari, and N. ViswanathanCite this: J. Am. Chem. Soc. 1973, 95, 19, 6473–6475Publication Date (Print):September 1, 1973Publication History Published online1 May 2002Published inissue 1 September...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConstituents of Helenium Species. X. Revised Structure TenulinWerner. Herz, W. A. Rohde, K. Rabindran, P. Jayaraman, and N. ViswanathanCite this: J. Am. Chem. Soc. 1962, 84, 20, 3857–3870Publication Date (Print):October 1, 1962Publication History Published online1 May 2002Published inissue 1 October 1962https://pubs.acs.org/doi/10.1021/ja00879a015https://doi.org/10.1021/ja00879a015research-articleACS PublicationsRequest reuse permissionsArticle...
To objectively estimate the extent of hearing loss in infants with cleft palate and to measure incidence loss.Retrospective consecutive case note review.Tertiary institutional regional referral center for lip palate.Consecutive cases 90 who underwent auditory brain stem response (ABR) threshold estimation.ABR estimation during natural sleep under 2 months age.Hearing level thresholds as estimated by categorized normal (< 25 < or = 35 dB nHL) , mild (> 45 nHL), moderate 65 severe profound...
The configuration at C-13a in tylophorine (I) has been established as S. Ozonolysis of gave (S)-pyrrolidine-2-acetic acid identical with a sample synthesized from (S)-proline. absolute analogous alkaloids the group can be deduced by comparison their o.r.d. spectra that tylophorine.
Abstract Die Experimente, die zur Ableitung der Formel I für Kopsin, dem Hauptalkaloid aus Kopsia fruticosa , führten, werden beschrieben.
Abstract Three new alkaloids designated as cyclostachine A (2), B (7) and cyclopiperstachine (10) have been isolated from Piper trichostachyon C. DC . Their structures derived on the basis of spectral degradative studies confirmed by synthesis. The 1 H‐ 13 C‐NMR. spectra these compounds are discussed.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConstituents of Helenium Species. XI. The Structure Pinnatifidin1,2Werner Herz, R. B. Mitra, K. Rabindran, and N. ViswanathanCite this: J. Org. Chem. 1962, 27, 11, 4041–4043Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10.1021/jo01058a068https://doi.org/10.1021/jo01058a068research-articleACS PublicationsRequest reuse permissionsArticle...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTConstituents of Iva species. VIII. Structure ivalbin, a modified guaianolide from dealbataWerner Herz, Hiroaki Chikamatsu, N. Viswanathan, and V. SudarsanamCite this: J. Org. Chem. 1967, 32, 3, 682–686Publication Date (Print):March 1, 1967Publication History Published online1 May 2002Published inissue 1 March 1967https://pubs.acs.org/doi/10.1021/jo01278a039https://doi.org/10.1021/jo01278a039research-articleACS PublicationsRequest reuse...
Abstract N‐Isobutyl‐11‐(3, 4‐methylenedioxyphenyl)‐undeca‐2,4,6‐ trans, trans ‐trienoic amide (II) and N‐isobutyl‐11‐(3,4‐methylenedioxyphenyl)‐undeca‐2,8,10‐ (III), two of the three possible structures alkaloid piperstachine, have been synthesized. Compound (III) has found to be identical with piperstachine. The 1 H‐ 13 C‐NMR. spectra compound are discussed.