- 30 - 
carljonate, an a"bimdr.nt precipitate of the diozime of quassic 
ncid, C2gH2g0g(C:!T0H)2, is- thrown down after a little time. 
It may "be purified "by crj'-stallizetion from dilute alcohol, 
when it is ootained in yellowish rectangular prisms; it melts 
at 228-230° \vith decomposition, 
TJhen quassin is heated with concentra.tod hydriodic acid 
(sp, gr, 1,70) and some omori;hous phosphorus for 20 hours, at a 
temperature of 150°, gradually increased to 280°, a reducing 
action t.al-:es place, which varies \/ith the temperature; at 150° 
methyl iodide is produced, while at the higher temperature 
resinous products and a mixture of hydrocorhons are ohtained. 
The latter, separated from the filtered and neutralized solution 
hy distillation with stcnm, appeared as a yellowish, oily liquid, 
v/hich on "being suhjectcd to f ractiono.1 distillation yielded three 
deiinir.G hydrocarhons. The first, "boiling at 188-195°, was, 
found to have the composition of 3-durene, Ct^qH]_5, and "by 
treatment with 'bromino yielded a "brominated derivative crys- 
talli<::ing in colorless needles melting at about 200°, The 
second fraction, hoiling at 220-240°, had the composition 
C-]_4K2_- and gave a orominr-tcd derivative which crystallized from 
alcohol in colorless needles, molting at about 150° and subliming 
at a lower temperature. The residue v/hich did not come over at 
240° contained anthracene. The cuthor considers it proved that 
quassin contains four hydro:<yl groups, two carboxymethyl groups, 
and tv;o ketone groips, Jrom other results obtained, which he 
hopes soon to publish, it would appear that quassin is an 
rjithraquinonc derivative. 
(82) 
COITSTITUTION OF QUASSIN. Gaz. Chim. Itcd. 18: 169-170. 1888. 
[in Italim. Ab;3trp„ct in Jour. Chem, Soc, [London] 56: 
278, 1889,] 
In a previous communication (81) the author pointed out 
that quassic <?.cid contained 2 kctonic groups since it gave rise 
to a dioximc. It seemed desirable to establish that these CO-groups 
existed olso in quassin, aiid for this pxirposc the author prepared 
the com.pound of quassin vrith phenyljo^^-dro^inc, Quassin (3 g, ) 
cjLd T)hcnylhy(]razine hydrochloride (4 g, ) were dissolved in the 
smallest possible quantity of alcohol, a solution of soditim 
acetate added (6 g, in 15 cc. water) end the whole heated at 
lOO'^ for run hour. The yellow, amorphous deposit formed on 
allowing it to remain for a do^r was thoroughly washed with 
water and attempts made to obtain it in a crystalline state 
but without success. An analysis showed that it had the composition 
C30H40O3 (ClT.iHPh)2, It is formed from phenylhydrazine and quassin, 
with elimination of the elements of wrtcr, thus: C2QH^Q0g(C0)p4- 
2KH2 . mH^-C 3qH4q0q ( CIT, ■ iSPh) 2+ 2H2O , 
