The structure of furanofukinol, a constituent of Petasites japonicus Maxim., proposed previously as 3α,6β-dihydroxyfuranoeremophilane (V-a) should be revised to 3α,6β-dihydroxyfuranoeremophilane (I) by the PMR study of 3-O-angeloyl-6-O-acetylfuranofukinol (VIII) and by the chemical conversion of furanofukinol to 3β-hydroxyeremophilanes (X-a,b). The structures of the two related sesquiterpenes, isolated from Farfugium hiberniflorum Kitam., must therefore be revised to 3β-angeloyloxy-6β-hydroxyfuranoeremophilane (VII) and 3β-angeloyloxy-6β-acetoxyfuranoeremophilane (VIII).
之前提出的日本婆婆纳(Petasites japonicus Maxim.)成分
呋喃福
金醇的结构为3α,6β-二羟基
呋喃叶莫
菲烷(V-a),但根据对3-O-
安息香酰基-6-O-乙酰基
呋喃福
金醇(VIII)的PMR研究以及
呋喃福
金醇向3β-羟基叶莫
菲烷(X-a,b)的
化学转化,该结构应改为3α,6β-二羟基
呋喃叶莫
菲烷(I)。因此,从北蓟(Farfugium hiberniflorum Kitam.)中分离出的两种相关
倍半萜的结构必须改为3β-
安息香酰氧基-6β-羟基
呋喃叶莫
菲烷(VII)和3β-
安息香酰氧基-6β-乙酰氧基
呋喃叶莫
菲烷(VIII)。