Oligo‐ and macrocyclic diterpenes in thymelaeaceae and euphorbiaceae occurring and utilized in Yunnan (Southwest China) 5. Daphnane type diterpene 9,13,14‐orthoesters from roots of Daphne papyracea

Abstract From roots of Daphne pupyracea Wall, two new diterpene esters, Daphne factors P1 and P2, were isolated. Both are esters of the polyfunctional daphnane type: P1 is the 9,13,14‐orthobenzoate‐12‐(2E,4E,6E‐decatrienoate) of 6a,7a‐epoxy‐5β, l2β‐dihydroxyresiniferonol. P2 is structurally nearly identical with P1, the only difference is located in the parent alcohol moiety: that of P1 carries an olefinic Δ1,2 unsaturation whereas P1 exhibits the 1,2α‐dihydro partial structure.