翼核果 A 和 B，来源于. 的氧桥型贝壳杉二萜二聚体
Pterolobirins A and B, Oxygen-Bridged Cassane Diterpenoid Dimers from the Fruits of .
机构信息
Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
出版信息
J Nat Prod. 2020 Jul 24;83(7):2241-2245. doi: 10.1021/acs.jnatprod.0c00354. Epub 2020 Jun 30.
Two dimeric cassane diterpenoids with an unprecedented 6/6/6/6/6/5/6/6/6 nonacyclic framework, pterolobirins A and B ( and ), were isolated from the fruits of . Their structures were assigned by interpreting the spectroscopic data. The absolute configuration of was unequivocally confirmed by single-crystal X-ray diffraction data. A putative biosynthetic pathway is proposed based on a regular intermolecular Diels-Alder reaction and an intramolecular nucleophilic addition.
从 的果实中分离得到了两个具有前所未有的 6/6/6/6/6/5/6/6/6 非环骨架的二聚卡莎二萜类化合物，即 pterolobirins A 和 B（ 和 ）。通过解析光谱数据确定了它们的结构。通过单晶 X 射线衍射数据明确确定了 的绝对构型。根据规则的分子间 Diels-Alder 反应和分子内亲核加成反应，提出了一个可能的生物合成途径。
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