250 
in the ether. The hydrochloric acid solution was next neutralized 
with sodium carbonate and the free colouring matter again taken 
up by ether. The ethereal solution was finally evaporated to dryness. 
The residue represented allophyllotaonine which originated from 
phyllotaonine under the influence of the elevated temperature. Allo¬ 
phyllotaonine may be crystallized from alcohol. We have at pre¬ 
sent a larger amount of this chlorophyll derivative at our disposal 
and we will shortly give a thorough description of its composition 
and properties. 
The conversion of allophyllotaonine into substances which we 
hold to be identical with Wills tatter’s phytorhodines takes place 
under the following conditions. 
One part of allophyllotaonine and about 50 parts of a 20°/ 0 so¬ 
lution of HC1 in alcohol were heated for six hours on a waterbath. 
The original green colour changes very gradually into an olive 
green %nd as soon as this stage is reached the further transforma¬ 
tion, characterised by a reddish brown colour, takes place rapidly. 
The product of reaction is poured next into a large amount of cold 
water and the acid neutralized by adding a solution of sodium 
hydrate, care being taken that the temperature of the liquid does 
not rise above 20°. The colouring matters are now extracted by 
ether and divided into two fractions, a soluble one in alkalies and 
an insoluble one. To this end the ethereal solution has been extrac¬ 
ted with a weak sodium hydrate solution, and after separating the 
alkaline layer from the ethereal one, the former acidulated with a 
small excess of acetic acid and extracted with ether. The ethereal 
solution containing the colouring matters possessing acid properties 
were next treated successively with a 2 1 / 2 %, 5°/ 0 , 7 1 / a % and 10°/ 0 
hydrochloric acid. The two weaker acids dissolved generally little 
of coloured substances, the two stronger acids took up a larger 
amount. Sometimes the colouring matters with acid properties divi¬ 
ded about equally between the hydrochloric acids named. The chief 
ethereal solution did not contain after this treatment any amount of 
colouring matter worth speaking of. 
The ethereal solution containing colouring matters devoid of 
acid properties was divided similarly into four portions of substan¬ 
ces with varying basic intensities, by shaking it successively with 
2°/ 0 , 5 °/oj 10% and 12% hydrochloric acid solutions. The former 
two solutions took up also in this case but little of the colouring 
