Structure and stereochemistry of four α-pyrones from Hyptis oblongifolia

The structure of arenol and homoarenol,

The structure of arenol and homoarenol, α-pyrone derivatives from helichrysum arenarium (L.) moench

✍ J. Vrkoč; L. Dolejš; P. Sedmera; S. Vašíčková; F. Šorm 📂 Article 📅 1971 🏛 Elsevier Science 🌐 French ⚖ 233 KB

Some time ago, we have reported isolation of the yellow pigment, m.p. 192-194O, analyzing C21H2407, from nbwers of the species Helichrysum arenarium CL.) MOENCHl 0 This report deals with the structure of this pigment. High resolution mass spectrometry revealed the pigment as a mixture of two compoun

Constituents with Radical Scavenging Eff

Constituents with Radical Scavenging Effect from Opuntia Dillenii: Structures of New α-Pyrones and Flavonol Glycoside.

✍ Yingkun Qiu; Yingjie Chen; Yupin Pei; Hisashi Matsuda; Masayuki Yoshikawa 📂 Article 📅 2003 🏛 John Wiley and Sons ⚖ 110 KB

## Abstract For Abstract see ChemInform Abstract in Full Text.

The reaction of carbon disulfide with α-

The reaction of carbon disulfide with α-diazo ketones. The structure and stereochemistry of the racemic product from 2-(p-bromophenyl)-2-diazoacetophenone

✍ K. Dichmann; D. Bichan; S.C. Nvburg; Peter Yates 📂 Article 📅 1971 🏛 Elsevier Science 🌐 French ⚖ 162 KB

The product formed from 2-diazo-2-phenylacetophenone (I) and carbon disul-

Covalent structure and some pharmacologi

Covalent structure and some pharmacological features of native and cleaved α-KTx12−1, a four disulfide-bridged toxin from Tityus serrulatus venom

✍ Dr A. M. C. Pimenta; P. Mansuelle; C. R. Diniz; M. F. Martin-Eauclaire 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 English ⚖ 140 KB

## Abstract A toxin with four disulfide bridges from __Tityus serrulatus__ venom was able to compete with ^125^I‐kaliotoxin on rat brain synaptosomal preparations, with an IC~50~ of 46 nM. The obtained amino acid sequence and molecular mass are identical to the previously described butantoxin. Enzy

Isolation and Molecular Structure of a M

Isolation and Molecular Structure of a Monomeric, Tris[peroxotitanium(IV)]-Substituted α-Dawson Polyoxometalate Derived from the Tetrameric Anhydride Form Composed of Four Tris[titanium(IV)]-Substituted α-Dawson Substructures and Four Bridging Titanium(IV) Octahedral Groups.

✍ Yoshitaka Sakai; Yuh Kitakoga; Kunihiko Hayashi; Kenji Yoza; Kenji Nomiya 📂 Article 📅 2005 🏛 John Wiley and Sons ⚖ 15 KB

Isolation and Molecular Structure of a M

Isolation and Molecular Structure of a Monomeric, Tris[peroxotitanium(IV)]-Substituted α-Dawson Polyoxometalate Derived from the Tetrameric Anhydride Form Composed of Four Tris[titanium(IV)]-Substituted α-Dawson Substructures and Four Bridging Titanium(IV) Octahedral Groups

✍ Yoshitaka Sakai; Yuh Kitakoga; Kunihiko Hayashi; Kenji Yoza; Kenji Nomiya 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 English ⚖ 192 KB

## Abstract The isolation and structural characterisation of a novel tris[peroxotitanium(IV)]‐substituted α‐Dawson polyoxometalate (POM), [α‐1,2,3‐P~2~W~15~(TiO~2~)~3~O~56~(OH)~3~]^9−^ (1a), containing side‐on coordination (i.e. η^2^‐coordination) of the peroxo group to the titanium(IV) atom are de