Results 221 to 230 of about 40,889 (265)

Synthesis of the C6−C21 Segment of Amphidinolide E

Organic Letters, 2005
[reaction: see text] A convergent approach to a C6-C21 segment of the polyketide amphidinolide E has been developed through combination of three subunits by allenylindium bromide-aldehyde addition and Suzuki sp2-sp3 coupling.
James A, Marshall, Gregory, Schaaf, Andrew, Nolting   +2 more
openaire   +2 more sources

Synthesis of the C21—C28 Segment of Pectenotoxin‐4.

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Robert V. Kolakowski, Lawrence J. Williams   +1 more
openaire   +1 more source

An evaluation of systems for paper chromatography of C21 steroids

Steroids, 1979
A group of moderately polar C21 steroids (3-5 oxygen functions) has been chromatographed in 9 solvent systems. Using the concept that standard deviation of the mean RF is an index of chromatographic resolution, and that coefficients of correlation between sets of RF data can be used to quantify the similarities of chromatographic systems, we have ...
V R, Mattox, R D, Litwiller
openaire   +2 more sources

C21 steroidal glycosides from Hemidesmus indicus

Phytochemistry, 2000
Two novel pregnane glycosides, denicunine (1) and heminine (4), have been isolated from the dried stem of Hemidesmus indicus R.Br. (family: Asclepiadaceae). Chemical transformations and spectroscopic evidence viz: 1H and 13C NMR spectroscopy and FABMS are consistent with the structures calogenin 3-O-3-O-methyl-beta-D-fucopyranosyl-(1-->4)-O-beta-D ...
P, Sigler, R, Saksena, D, Deepak, A, Khare   +3 more
openaire   +2 more sources

Photoactive C16-C21 fragmentation of catharanthine

Tetrahedron Letters, 1991
Photolysis of catharanthine in the presence of several potential electron acceptors and cyanide ion leads to either addition of cyanide at C3 and C5 or to C16-C21 fragmentation and addition of cyanide at C21.
Richard J. Sundberg, Patrice Desos, Kumar G. Gadamasetti, Michal Sabat   +3 more
openaire   +1 more source

C21

2023
openaire   +1 more source

Effects of the Oral Angiotensin II Type 2 Receptor Agonist C21 in Sugen-Hypoxia Induced Pulmonary Hypertension in Rats

International Journal of Molecular Sciences, 2023
Dan Salvail, Christopher P Denton, Denton Christopher P   +2 more
exaly  

Mosquito CYP4C21 knockout reduces dengue virus and Zika virus replication in Aedes aegypti cells

Biosafety and Health, 2023
Tongyan Zhao, Chunxiao Li, Xinyu Zhou
exaly  

Red fluorescence of C19 and C21 steroids

Analytical Biochemistry, 1969
E, Orti, J, Neuwirth, J, Scharoun
openaire   +2 more sources

C21

2005
Ch. Wohlfarth, B. Wohlfahrt
openaire   +1 more source