454 R. ROBINSON AND H. G. SMITH. 
It is now proposed to make a series of oxidation and other 
experiments in order to advance further in our knowledge 
of this central portion of the molecule. 
It will be admitted that methylation is an adventitious 
part of the synthesis of a plant product, and the formula 
of eudesmin stripped of its methyl groups appears as 
(HO)2CsH3s—CsHs02—C.gH3(OH)2 
If now a process of hydrolysis be imagined to occur, it. 
will be seen that the nor-eudesmin splits up into three 
groups, each of which is in the same state of oxidation and 
could be regarded as a condensation product of a hexite 
CeH140c. 
(HO )2xC6H3——CsHs02- —CesH;3(OH)2 OC.H,O2 + 4 HO 
H | OH HO|H and OgHi00,4 + 2 HeO 
OgHg02 | CeHi1004 | CeH6O2 = O,H140¢ 
We believe therefore that when the constitution of 
eudesmin is completely elucidated, the central portion will 
be found to be readily derivable from a reduced hexose 
structure. 
Experimental. 
ISOLATION OF EUDESMIN FROM THE KINO OF HUCALYPTUS 
HEMIPHLOIA. 
The air-dried kino was finely powdered, passed through 
an 80 mesh sieve and heated on the water bath with such 
a quantity of water that the mass acquired the consistency 
of thick treacle. This was cooled, and extracted eight or 
nine times with a considerable volume of ether, the com- 
bined yellowish extracts being then distilled. The residue, 
resulting from the evaporation of the ether was crystalline 
and consisted of a mixture of eudesmin and aromadendrin. 
It was recrystallised from as small a quantity of ethyl 
alcohol as possible, and the finely powdered, dried crystals 
treated with cold chloroform, a solvent which dissolves 
