𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Constituents of Californian redwood the structures of sequirin B and C

✍ Scribed by N.A.R. Hatam; D.A. Whiting

Book ID
104213152
Publisher
Elsevier Science
Year
1967
Tongue
French
Weight
276 KB
Volume
8
Category
Article
ISSN
0040-4039

No coin nor oath required. For personal study only.

✦ Synopsis

Serious chemical investigations into the phenolic constituents of Sequoia sempervivens heartwood have previously been reported on two occasions. Sherrard and Kurth' described a crystalline material, m.p. 214', named sequoyin and more recently Balogh 2 and Anderson , using their "chromatostick" technique 3 separated three products, Sequirin-A, Sequirin-B, and Sequirin-C, from the expressed extract of fresh green redwood. No structures were sui;gested. We now report the results of our studies on extractives from seasoned heartwood. Concentrated aqueous extract of redwood was extracted with ether, and the ether soluble material was crystallised from acetone-benzene, and then from ethanol to give sequirin-B', m.p. 2l2-2l3', C H 0 17 18 5' tetra-acetate n.p. ION', trimethylether m.p. 135-136',

πŸ“œ SIMILAR VOLUMES

The structures of coriolin B and C
The structures of coriolin B and C
✍ Shuji Takahashi; Hironobu Iinuma; Tomohisa Takita; Kenji Maeda; Hamao Umezawa πŸ“‚ Article πŸ“… 1970 πŸ› Elsevier Science 🌐 French βš– 143 KB
Structures of neopolyoxins A, B, and C
Structures of neopolyoxins A, B, and C
✍ Masakazu Uramoto; Kimie Kobinata; Kiyoshi Isono; Tsutomu Higashijima; Tatsuo Miy πŸ“‚ Article πŸ“… 1980 πŸ› Elsevier Science 🌐 French βš– 323 KB
Constituents of holothuroidea, I. Isolat
Constituents of holothuroidea, I. Isolation and structures of three triterpenoid aglycones, cucumechinol A, B, and C, from the sea cucumberCucumaria echinata
✍ Miyamoto, Tomofumi ;Togawa, Kenichi ;Higuchi, Ryuichi ;Komori, Tetsuya πŸ“‚ Article πŸ“… 1990 πŸ› John Wiley and Sons 🌐 English βš– 351 KB

## Abstract Three new holostane^2)^‐type triterpenoid aglycones named cucumechinol A (1), B (2), and C (3) were isolated from the acidic hydrolysate of the crude glycoside mixture prepared from the whole sea cucumber __Cucumaria echinata__. The structures were identified on the basis of spectral ev