20 
“ The aceti yl derivative, prepared in the usual manner, Uds 
from alcohol in colourless needles melting at 189-191? 
* 0:1195 gave 0:2567 CO; + 0:0462 H,O. C= 58:65; H = 429. 
0,,H50;(0H,0), requires C = 58:59; H = 3:90 per cent. 
By fusion with alkali, two crystalline decomposition products 
were obtained melting respectively at 210° and 195-196°; these 
sucre of phlor oglucinol and p; ae "e acid. The colouring 
matter resulting from the decomposi of the glucoside was 
evidently, therefore, que? vet ” a fa i also corrobora ted on 
examining its dyeing propert 
* The Sugar. —lIn order to dmn some insight as to the nature 
present in this solution being obviously too small to allow of its 
M uid means of crystallisation and analysis, the liquid 
was treated with phenylhydrazine pcos in the presence of 
tel haein: in order to obtain the osazone, and the crystalline 
product formed was purified by extraction with small quantities 
of acetone and subsequent crystallisation from dilute alcohol. 
It consisted of glistening, yellow needles melting at 205°, 
apparently M 
* The decomposition of Es glucoside with acid can be therefore 
represented res the equatio 
C5zH40,, T 2H, O= = C45H,,0; + 2C gH i20¢. 
“ This reaction requires a yield of 48:24 per cent. of quercetin, 
Morekendre- the amount actually obtained (see above) is equal to 
“ Three di stinct glucosides of quercetin have been described, of 
which quercitrin and rutin are the best known. The former, 
quercetin and one molecule of Dois whereas the latter, a 
constituent of rue (Ruta graveolens), when so wee yields 
quercetin and two molecules of the same suga ola- arora in, 
the third, obtained by Mandelin (Jahresber., 1383. 1369) fro 
flowers of Viola tricolor vivariensis, gave, in a similar WT. 
quercetin and glucose, as indicated by the following equation, 
which is based upon the old formula of this colouring matter. 
* C44H4305, + 95H40 = C4H4,,0,, + 20,H350,. 
*As Mandelin's full paper is published in the Russian 
Pharmaceutical Journal, to which I have not access, it is not 
possible to be certain whether this equation is based upon the 
Sm : 
sed by acid. Consequently, the formula of viola-quercitrin, 
C34H4,04 (025419; H = 451), if corrected AE to the 
true formula of quercetin, may be expressed in two w 
[Pally ae 31; H = 4°31) or C5H0,, (C = 54° 91; H=4-40), 
Cx H0» + H20 = C,,H,,0; + C,H3,0 
C; Ha0;; T 4H;0 = C, gy (9; + jodio. 
“Of these, the latter formula, though possessing a somewhat 
high percentage composition, would appear more probable, giving, 
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