Abstract
Jatrofolianes A (1) and B (2), which are two highly modified lathyrane diterpenoids, were isolated from Jatropha gossypiifolia. 1 incorporates an unusual transannular 1,3-dioxolane moiety, forming a unique 5/6/5/8/3 ring system, while 2 possesses a new 10,11:13,14-diseco-lathyrane skeleton with a 12-membered macrocyclic lactone ring. Their structures were determined by spectroscopic analysis, quantum chemical calculations, and single-crystal X-ray diffraction. 2 showed significant multidrug resistance (MDR) reversal activity to cancer cells HepG2/ADR and HCT-15/5-FU at 10 μM.
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