Spiromyrrhenes A–D: unprecedented diterpene–sesquiterpene heterodimers as intermolecular [4 + 2] cycloaddition products from Resina Commiphora that inhibit tumor stemness in esophageal cancer
期刊:Organic chemistry frontiers [The Royal Society of Chemistry] 日期:2020-09-15卷期号:7 (18): 2710-2718被引量:4
标识
DOI:10.1039/d0qo00656d
摘要
The structures and stereochemistry of spiromyrrhenes A–D (1–4), isolated from Commiphora exudates, were elucidated using NMR and ECD methods. They are the first examples of hepta- and octa-cyclic heterodimers possessing C35 skeletons, for the biosynthesis of which intermolecular [4 + 2] cycloaddition has been proposed. Biological studies show that they suppress tumor stemness in esophageal cancer by inactivating the Hippo/Yap pathway.