Results 201 to 210 of about 73,566 (229)

Structures of three C32 triterpenoids from Neolitsea pulchella

Journal of the Chemical Society C: Organic, 1971
Three triterpenoids isolated from Neolitsea pulchella, have been proved by n.m.r. and mass spectral data, and chemical correlations with one another and with cycloneolitsin (3β-methoxy-24,24-dimethyl-9,19-cyclolanost-25-ene) to be 3β-methoxy-24,24-dimethyl-lanosta-9(11),25-diene (I), 24,24-dimethyl-lanosta-9(11),25-dien-3-one (II), and 24ξ-hydroxy-3β ...
W. H. Hui, K. Luk, H. R. Arthur, S. N. Loo   +3 more
openaire   +1 more source

Mallotin—a new C32 triterpenoid from Mallotous stenanthus

Phytochemistry, 1975
Abstract Mallotin, a new C 32 triterpene from Mallotous stenanthus , has been isolated and its structure established as 24,24-dimethyl-lanosta-7,25-dien-3α-ol.
Raghwendra Pal, D.K. Kulshreshtha, R.P. Rastogi   +2 more
openaire   +1 more source

Calyculins. Asymmetric synthesis of the C26-C32 fragment

Tetrahedron Letters, 1994
An efficient and highly stereocontrolled method for the construction of the natural syn stereochemistry at C30 and C32 in the calyculin C oxazole fragment has been devised starting from alanine. The title fragment itself is accessible in seven steps from N-BOC-alaninal.
Ari M.P. Koskinen, Petri M. Pihko
openaire   +1 more source

Synthesis of the C10−C32 Core Structure of Spirangien A

Organic Letters, 2008
The synthesis of the C10-C32 core structure of spirangien A is reported. The pivotal aldol coupling between both key intermediates provides a synthetic challenge in the synthesis of this complex natural product.
Michael, Lorenz, Markus, Kalesse
openaire   +2 more sources

Electronic structures and spectral characteristics of the six C32 fullerene isomers

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2019
In this paper, the six C32 isomers which were of crucial importance in the manufacture of new electronic components were identified by X-ray photoelectron spectroscopy (XPS) and near-edge X-ray absorption fine structure (NEXAFS). For the discernment, geometry optimizations of the six isomers have been carried out, and the C1s XPS and NEXAFS spectra ...
Juan Lin, Jing Hu, Jun-Rong Zhang, Sheng-Yu Wang, Yong Ma, Xiu-Neng Song   +5 more
openaire   +2 more sources

Biosynthèse de l'acide C32-mycocérosique incorporation d'acide propionique

Biochimica et Biophysica Acta, 1963
Abstract [I-14C]Propionic acid is incorporated into the branched end of C32-mycocerosic acid and of its lower C26-homolog.
Mireille Gastambide-Odier, Jeanne-Marie Delaumény, Edgar Lederer   +2 more
openaire   +1 more source

MPEC 2025-C32 : 2025 CU

The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
openaire   +1 more source

C32. A New Proposed Anti-collision Algorithm for RFID

2013 30th National Radio Science Conference (NRSC), 2013
Abstract-Radio Frequency Identification (RFID) systems are used in a variety of applications to uniquely identify physical objects. However, the most popular problem that always faces RFID systems is the collision between several tags that are present in the interrogation zone of a single reader at the same time. So, the reader will receive data, which
Amira S. E- Batouty, Hania H. Farag, El-Sayed E. Badawy   +2 more
openaire   +1 more source

Orthorhombic C32: A topological semimetal with nodal ring

Physics Letters A, 2022
Ye Tao, Kun Bu, Jian-Tao Wang
openaire   +1 more source

C32

2023
openaire   +1 more source