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In order to find more biologically active substances,we have carefully investigated the chemical constituents of Pterocypsela elata.One new guaianolide,(4S)-11-methoxycarbonyl-guaiane- 1(10),5(6),7(11),8(9)-tetraen-6,l2-olide was isolated from the EtOAc extracts of the roots of P.elata. Its structure was elucidated by various spectroscopic methods and confirmed by X-ray crystallographic analysis.
In order to find more biologically active substances, we have carefully investigated the chemical constituents of Pterocypsese elata. One new guaianolide, (4S) -11-methoxycarbonyl-guaiane- 1 (10), 5 (6), 7 (11), 8 (9) -tetraen-6, l2-olide was isolated from the EtOAc extracts of the roots of P.elata. Its structure was elucidated by various spectroscopic methods and confirmed by X-ray crystallographic analysis.