Zobrazeno 1 - 10
of 50
pro vyhledávání: '"M. Bilayet Hossain"'
Autor:
M. Bilayet Hossain, Dick Van der Helm
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 88:1413-1423
The crystal structure of crassin p-iodobenzoate has been determined by the heavy-atom technique and refined by the least-squares method using three dimensional intensity data. The crystal is monoclinic with cell dimensions: a = 6.492 ± 0.002, b = 18
Autor:
Xiong Fu, Long-Mei Zeng, Dick Van der Helm, J. Francis Schmitz, M. Bilayet Hossain, Florecita S. de Guzman, Jing-Yu Su
Publikováno v:
Chinese Journal of Chemistry. 9:136-143
Three pyrrololactam alkaloids have been isolated from the marine sponge Phacellia fusca Schmidt collected from the South China Sea, and their structures were determined as 1–3, on the grounds of spectral data. This is the first report of these comp
Pyramidalized Olefins: Ab Initio Study and X-ray Structure Determination of Bicyclo[2.2.2]octadienes
Autor:
M. Bilayet Hossain, Richard V. Williams, Vijay R. Gadgil, Edward T. Seidl, Michael E. Colvin, Dick Van der Helm, W. Daniel Edwards
Publikováno v:
The Journal of Organic Chemistry. 63:5268-5271
Publikováno v:
Natural Product Letters. 12:75-83
Oxidation of two sesquiterpenoids, 4α-formamido- and 4α-isocyanogorgon-11-ene (1 and 2), isolated from the sponge Axinyssa terpnis, with m−chloroperbenzoic acid yielded unexpected cyclization products 3 and 4, respectively, instead of epoxides. T
Publikováno v:
Journal of Chemical Crystallography. 28:23-26
The structure and absolute configuration (3R, 17R) of the indole alkaloid arborescidine C were determined by x-ray diffraction. The six-membered ring assumes a half-chair conformation and the seven-membered ring has a twist-like conformation. The cry
Publikováno v:
Journal of Chemical Crystallography. 28:57-60
The crystal structure determination of the Ga(III) complex of racemized anguibactin (C15H16N4O4S) confirms the previously predicted chemical structure of this novel siderophore isolated from the fish pathogenic bacterium, Vibrio anguillarum 775. The
Publikováno v:
Journal of Chemical Crystallography. 28:53-56
The structure of the retro-isomer of ferrioxamine E sesqui-hydrate, a ferrioxamine E analog in which the N-hydroxy and carbonyl functions are transposed, was found to be isomorphous with that of ferrioxamine E. The interchange of N and C atoms in the
Publikováno v:
The Journal of Organic Chemistry. 62:3810-3819
A group of nine farnesylated quinones (1−9) featuring new macrocyclic skeletons formed by farnesyl units bridging the quinones in the meta or para positions have been isolated from a tunicate, Aplidium longithorax. Three of these are monomeric C21
Autor:
Sameer Tyagi, K. Darrell Berlin, M. Bilayet Hossain, Cindy Sinars, Dick Van Der Helm, Subbiah Sangiah
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 123:385-406
Autor:
Maureen Laney, Ronnel Cabuslay, Dick Van der Helm, M. Bilayet Hossain, Syed A. Abbas, Randall C. Schatzman, Francis J. Schmitz
Publikováno v:
The Journal of Organic Chemistry. 61:2709-2712
Two new alkaloids, polycarpine (1) and N,N-didesmethylgrossularine-1 (4), have been isolated from extracts of the ascidian Polycarpa aurata collected in Chuuk, Federated States of Micronesia. Three degradation products of 1 were also isolated. The st