ヤブタバコ成分の研究 (第1報)

抄録

1) Triacontane, C₃₀H₆₂, and a kind of sesquiterpenolactone were isolated from the seeds of Carpesium abrotanoides (Compositae) and the latter was named carpesia-lactone.
2) Carpesialactone is a viscuous liquid, b.p.₅ 200-202°, possesses powerful irritating properties and bitter taste. It easily polymerizes and corresponds to C₁₅H₂₀O₃.
3) This lactone absorbs 2mol. hydrogen and forms tetrahydro-carpesialactone, C₁₅H₂₄O₃, b.p.₅ 218-220°, loses polymerizability and becomes stable.
4) Both carpesialactone and tetrahydrocarpesialactone give positive Liebermann's reaction and form azulene by dry distillation with selenium or charcoal dust.
5) Tetrahydrocarpesialactone seems to be reduced by selenium or hydriodic acid and gives oily substance of specific odor, b.p. 215°, being assumed as alkylated decaline in both casses. The latter compound has similar specific gravity and refraction as those of decaline derivatives.