16836-28-5Relevant articles and documents
Sesquiterpenes and phenolic compounds from achillea clypeolata
Werner, Ingrid,Mucaji, Pavel,Presser, Armin,Glasl, Sabine
, p. 267 - 271 (2008/03/13)
The investigation of a dichloromethane extract of flower heads of Achillea clypeolata collected in Bulgaria led to the isolation of one guaiane (4,10,11-trihydroxy-guaiane, 1), four eudesmanes (4(15)-eudesmene-1β, 11-diol, 2, clypeotriol, 3, 3-epi-clypeotriol, 4, cryptomeridiol, 5), one diterpene (sugeroside, 6) and two phenolic compounds (centaureidin, 7 and scopoletin, 8). Their structures were elucidated by UV/vis, EI- and CI-MS as well as by one- and two-dimensional NMR experiments. 4,10,11-Trihydroxy-guaiane (1) and 3-epi-clypeotriol (4) are reported here for the first time.
GUAIANOLIDES AND HELIANGOLIDES FROM HYMENOPAPPUS NEWBERRYI
Bohlmann, F.,Zdero, C.,Turner, B. L.
, p. 1055 - 1058 (2007/10/02)
The aerial parts of Hymenopappus newberryi afforded two heliangolides, two thymol derivatives, as well as two new guaianolides and a trans,trans-germacranolide closely related to hiyodorilactone A.Furthermore, the ent-kaurene derivative abbeokutone was present.These results are of chemotaxonomic interest.Key Word Index - Hymenopappus newberryi; Compositae; sesquiterpene; lactones; guaianolides; heliangolides; ent-kaurene derivative; chemotaxonomy.
