Twelve tricyclic ethers of the labdane and ent-labdane series, 5–16, have been synthesized; compounds 6–15 are new. The intramolecular C18-acetals 1–4 and the tricyclic ethers 5–16 were submitted to an olfactory test which was characterized by an exceptionally high percentage of ‘wrong’ answers (cf. Table 1, footnote b). For most compounds specific anosmia, rapidly ensuing fatigue and a high percentage
十二半日花烷和三
环醚耳鼻喉科-labdane系列,5-16,已经被合成; 化合物6-15是新的。分子内的C 18-
乙缩醛1-4和三
环醚5-16接受了嗅觉测试,其特征是“错误”答案的百分率很高(参见表1,脚注b)。对于大多数化合物特定的失眠症,最显着的特征是快速随之而来的疲劳和高百分比的气味偏差。