The conifer Dacrydium Franklinii, Hook.) is restricted to Tasmania where it is known as Huon pine.
From the leaves 0,5 p. c. of volatile oil was obtained: d170/150 0,8667; aD + 20,5°; nD25o1,4815; soluble in an equal volume or more of absolute alcohol. In the carefully fractionated oil 1-a-pinene (nitrosochloride, m. p. 110 to 111°) and d-Iimonene (tetrabromide, m. p. 104°) were identified. The principal constituent, however, is a new terpene named dacrydene by the authors. Dacrydene boils at 165 to 166° (corr.) (d22o 0,8524; aD +12,3°; ; nD22o1,4749) and yields a nitrosochloride melting at 120 to 121". The analysis agrees with the formula C10H16: found C 88,14 p. c; H 11,65 p. c; computed C 88,24 p. c, H 11,76 p. c. The addition of bromine was accompanied by the liberation of hydrogen bromide and resulted in the formation of a substance the analysis of which agreed with that of a tribromide. In addition there was indicated the presence of methyleugenol, which was identified by its oxidation to veratric acid (m. p. 178 to 179°).
The dry wood yielded 0,56 p. c. of oil: dl8o 1,035; aD-f-l,4°; nD28„ 1,5373; S.V. 3,1; also2) d15o1,0443; «D + 0°6'; nD20o1,53287; A. V. 0,9; E. V. 1,5. This oil consists largely (about 97,5 p. c.2)) of methyleugenol (m. p. of the tribromide 77 to 78°; m. p. of the veratric acid 178 to 179°). Of eugenol (benzoyleugenol, m. p. 70°) only traces are present and at times it seems to be wanting completely3). The high boiling fractions yielded the color tests for cad inene.