COMMERCIAL NOTES AND SCIENTIFIC INFORMATION. 51 
A good many years ago we distilled a small parcel of dacryodes resin’), from 
which we obtained about 16 p.c. of a yellowish, mobile oil with an agreeable aromatic 
_ odour, this result confirming More’s statements. The specific gravity of our oil was 
0,8875 at 15°, its rotation was ap — 13° 20’. 
We have now submitted this oil to closer investigation, and have found it to 
possess the following characters: dis0 0,8880, %p —- 13°40’, acid v. 1,2, ester v. 11,2, 
ester v. after acet. 56,0. With the object of isolating and identifying the sylvestrene 
we first fractionated 100 gr. of the sample: — 
fo Bop. 156) to, 70° 10 °/o bp — 21° 
eRe rag (750 1 30, Nig a 19050" 
=O cri anemia | 78S vl ANS pal yf ks A 20 °/o ay — 17° 30’ 
OT ETS SRO" 15 Chire a 440 45" 
Residtio tts. ts an Cextrorotatory. 
In order to obtain the hydrochloride we passed dry hydrochloric acid gas up to 
saturation point into the cooled ethereal solution of all the fractions, and drove off 
the ether after leaving standing for 3 days. The hydrochloride separated out under 
strong cooling, and was pressed on cooled porous tiles. 
Fraction 2 (sp. gr. 0,8689 at 15°), when treated in this manner, afforded in 
addition to portions which had remained liquid, /-sylvestrene hydrochloride. When 
recrystallised from alcohol it had m. p. 68° and sp. rot. [¢]p — 21,3° (in a 4,3 p.c. 
ethereal solution). . 
Fraction 3 (diso 0,8708) yielded a substance melting at 63°, sp. rot. [«]) — 19,5° 
(in a 6,6 p.c. ethereal solution). This product was apparently rather less pure than 
the foregoing. 
Fraction 4 afforded a product much contaminated by liquid hydrochloride, of which 
the m.p., in spite of repeated recrystallisation, did not surpass 50°. 
We were able to prove the presence in fraction 1 of «-pinene (b. p. 156 to 160°) 
from its nitrolbenzylamine compound (m.p. 122°), whereas portions boiling between 
164 and 167° were repeatedly tested for 6-pinene without result. The fraction boiling 
between 164 and 167° appears to contain traces of camphene, inasmuch as after 
hydration and saponification a small quantity of oil was obtained which, after treatment 
with potassium permanganate, had a well-defined odour of camphor. 
When treating a somewhat larger portion of oil (1500 gr.), which we distilled first 
with steam, then in vacuo and finally over sodium, we obtained on the whole similar 
results as with simple fractionation. We observed, during this manipulation, that the 
I-sylvestrene which was present in the oil appears to be inclined to resinify and that 
its specific gravity is therefore only low when it is freshly-distilled. 
Finally we obtained the following fractions: — 
1. 154 to 162° Beg. sa, 21°40! > digo 0,8633 
164, 1679 106g. %—25°10’ — diso 0,8637 
Wee Asse a 22°” 0! diss 0/8640 
fe 2? 130. ge — 199.47! dino, 0,8050 
PE AIO) 200 8. an — 19° 2" ding 0.8652 
ioe iS! 100 a. | a, — 189 42". disa 08063 
eee OOo ie, «| o, 12° 43° digs 0.0465 
(4 to 5mm.) : 
SSeS SN 
1) Report October 1901, 20. 
4* 
