The Wellcome Chemical Research Laboratories, London.

  • Frederick Belding Power
Date:
1914
Catalogue details

Licence: Attribution 4.0 International (CC BY 4.0)

Credit: The Wellcome Chemical Research Laboratories, London. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

    21/84 page 19
    ' One of the crystalline constituents of olive leaves which had been isolated in the course of the above-mentioned investigation possessed the formula C31H50O;1, and was designated oleano!. This compound has been made the subject of further chemical study, and a number of interesting derivatives have been prepared from it (Journ. Ghent. Soc., 1913. 103, pp. 2050-2060). Eriodictyon Californicum (Hooker el Arno!/) Greene ( Yerba Santa ” ) 1 This plant, as its name indicates, is a native of Cali- fornia. The leaves are used medicinally, and are 1 recognised by the Pharmacopoeia of the United States. A recent chemical examination of the leaves, conducted in these laboratories, has shown them to. contain several new and interesting substances. Among these there are two crystalline compounds of a phenolic nature which may specially be noted, namely, eriodictyol, CjT-1,.,0,;, and homo-eriodictyo’, Clt;H] |Ot; (Proc. Atner. Phartn. Assoc., 1906, 54, pp. 352-369). Homo-eriodictyol has been made the subject of a special investigation with reference to its constitution, which has definitely been •established (Journ. C/iem. Soc., 1907, 91, pp. 887-896; Proc. Client. Soc., 1907, p. 243). A further examination of the constituents of Eriodic- tyon, with the use of a portion of the same lot of extract ms had been employed for the previous investigation, ^resulted in the isolation of two new compounds, which have been designated, respectively, xanthoeridol, 'C,.Hu04(0H)3, and criodoiw!, C19H,403(0H)4. A substance •of the composition Cl(;H120„, which was previously isolated, hut to which no name was assigned, has also been further 'Characterised, and designated as chrysoeriol, C^HyO^OH)., '.(Journ. Cheat. Soc., 1909, 95, pp. 81-87). In order to confirm the previous conclusions respecting *thc constitution of eriodictyol, of homo-eriodictyol, and •of hesperitin (Journ. Chem. Soc., 1907, 91, pp. 887-896),
    digitised image 1
    digitised image 2
    digitised image 3