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An acetone extract from the aerial parts of Euphorbia bungei afforded three new (2, 3 and 5) and one known (4) macrocyclic diterpenoids. Several cycloartane triterpenoids were also obtained, two of which (6a and 6b) were assayed for antiviral effects. The structures of all new compounds were elucidated using modern spectroscopic methods including 2D NMR and HRMS.
Purpose. The biological activities of macrocyclic jatrophane polyesters 13 from the Sardinian endemism Euphorbia semiperfoliata Viv. have not been evaluated in depth. We investigated the microtubule-interacting and antiproliferative activities of these drugs and the molecular mechanisms underlying their effects. Methods. We tested jatrophanes for their interaction with purified bovine brain tubulin...
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