126 
55-29% C 
3-09% H 
1514% S. 
Accordingly there cannot be any doubt that datiscetin contains 
indeed four hydroxyl groups. 
As regards the glucoside like body which yields datiscetin on 
being treated with acids, and the purifications of which bas been 
described in our former communication we have arrived at the con¬ 
clusion that it is safest to prepare it for analysis by drying it at 
ordinary temperature in a desicator over anhydrous phosphoric 
acid. Drying at higher temperatures causes partial decomposition. 
We obtained the following results: 
1) 0-2010 gr 
gave 0-4009 
gr 
C0 2 and 
00915 
o-r 
H 2 0 
2) 0-2092 „ 
„ 0-4198 
. 11 
ii ■ ii 
00962 
11 
ii 
3) 0-2032 „ 
0-4062 
11 
ii ii 
0-0942 
11 
ii 
4) 0-1992 „ 
„ 0-3968 
ii 
ii ii 
0-0896 
11 
n 
5) 0-2012 „ 
„ 0-4034 
in. 
ii n 
0-0924 
11 
ii ■ 
corresponding to: 
1) 54-39% C and 5-09% 
H 
2) 54-73o/ 0 „ 
7) 
5-14% 
ii 
3) 54-52»| „ 
n 
5-18% 
ii- 
4) o4 4 33°/ 0 „ 
ii 
5-03% 
ii 
5) 54-68% „ 
ii 
5-13% 
middle 
54-53% C and 511% 
H. 
These values agree best with the supposition that datiscetin pos- 
seses the formula C n H 22 Oi 2 although the ‘theoretical values do not 
agree very well with the experimentally found ones. The formula 
Cn H22 Oi2 requires namely: 54 - 07 % C and 4-72 % H. Stenhouse *) 
arrived at analogous results in his researches. Based upon the know¬ 
ledge of the composition of other glucosides we have to suppose 
that whereas datiscetin possesses when dryed at ordinary tempe¬ 
rature the composition Cm H 22 Oi 2 it must contain a molecule of wa¬ 
ter of crystallisation, and the formula may be therefore changed into 
Cm H 20 On -j- H 2 0. The disintegration of datiscetin under the in¬ 
fluence of acids may be therefore formulated by the following equation: 
C.1 H 22 0,2 + H 2 0 = C 15 H o 0 6 + a H 12 On -f h 2 0 . 
q Liebigs Annalen 98 , 147 (1856). 
