— 17 — 
when treated with benzylamine, yielded pinene nitrolbenzylamine 
melting at 123°. 
As camphene boils at a slightly higher temperature than pinene, 
the fraction boiling between 161° and 164° was employed for the 
detection of this terpene. The fraction had the following constants: 
d^^o = 0,8678; aj) 26° 5'. One part of this fraction was heated 
for 2 to 3 hours to 60° — 70° with 3 parts glacial acetic acid and 
a few drops 50 per cent, sulphuric acid, and the mixture then poured 
into water. The oil separating off contained isobornyl acetate, which 
was already evident by the odour of the reaction-mixture. In order 
to enrich this ester, the separated oil sufficiently washed with soda 
and water was fractionated in vacuo. The fraction richest in ester 
then yielded on saponification with alcoholic potassa, solid isoborneol 
of the melting point 210°. From 440 grams of the camphor fraction 
23 grams isoborneol w^ere obtained. For the further detection a part 
of the isorborneol was again converted into camphene by means of 
zinc chloride in benzene solution. This melted at 50°. Another part 
of the isoborneol, when oxidised with chromic acid in glacial acetic 
acid, yielded camphor of the melting point 176°; (a)p in alcoholic 
solution -|- 3° 23^ The oxime produced from it melted at 118°, and 
was laevorotatory. The fraction 161^ to 164° of camphor oil behaves 
consequently as a pinene fraction containing camphene. It was further 
possible to detect in the fractions boiling about 170° (by means of 
Hirschsohn's iodol-cineol reaction), cineol, which had already been 
detected earlier by the hydrobromic acid method. 
Oil of Carana Elemi Resin. A. Tschirch and A. Saal^) 
communicate an examination of carana elemi resin from Protium carana 
(Humb.) L. March. The resin collected in 1887 by A. Gaillard 
near San Fernando de Atabapo in Venezuela, had a greenish-yellow 
colour and reminded of the odour of fennel, dill, and lemon oil. It 
dissolves in warm alcohol and also in the other usual solvents, such 
as ether, chloroform, benzene, etc. By successive extraction of the 
ethereal solution of the resin with ammonium carbonate and soda 
solution, several acids were isolated, viz. isocareleminic acid Yi^^ O^, 
melting at 75^; careleminic acid C4Q 115^04, m. p. 215°; and carelemic 
acid CgyHggO^, m. p. 120°. There were also obtained: a product, 
caramyrin CgoHg^O, aj) + 0°, m. p. 175°, identic with amyrin which 
is derived from other elemi-varieties, and which by means of benzoyl 
chloride could be split up into an a- and a /3-amyrin of different 
melting points, and an essential oil to which the resin owes its odour. 
This oil boils chiefly from 170° to 172°. No further data of its prop- 
erties are given. 
^) Arch. d. Pharmacie 241 (1903), 149. 
2 
