Isolation of grosshemin from the Siberian population of Centaurea scabiosa

Natural sesquiterpenoids

“…The lactone hololeucin 429, isolated from Centaurea hololeuca, represents the first example of a natural cyclic carbonate. 364 Known guaianolides have been obtained from Centaurea helenioides, 375 Centaurea ptosimopappa, 376 Centaurea scabiosa, 377 Chondrilla juncea, 378 Ixeris dentata, 379 Rhaponticum pulchrum 380 and Taraxacum bessarabicum 381 The structures of a guaianolide 382 458 and of a tetrabromoderivative of cyclopropyldihydroargablin 383 have been determined by X-ray analysis. A conformational analysis of several 11,13-oxetane lactones has been carried out.…”

Natural sesquiterpenoids

“…The lactone hololeucin 429, isolated from Centaurea hololeuca, represents the first example of a natural cyclic carbonate. 364 Known guaianolides have been obtained from Centaurea helenioides, 375 Centaurea ptosimopappa, 376 Centaurea scabiosa, 377 Chondrilla juncea, 378 Ixeris dentata, 379 Rhaponticum pulchrum 380 and Taraxacum bessarabicum 381 The structures of a guaianolide 382 458 and of a tetrabromoderivative of cyclopropyldihydroargablin 383 have been determined by X-ray analysis. A conformational analysis of several 11,13-oxetane lactones has been carried out.…”

Natural sesquiterpenoids

“…364 Known guaianolides have been obtained from Centaurea helenioides, 375 Centaurea ptosimopappa, 376 Centaurea scabiosa, 377 Chondrilla juncea, 378 Ixeris dentata, 379 Rhaponticum pulchrum 380 and Taraxacum bessarabicum 381 The structures of a guaianolide 382 458 and of a tetrabromoderivative of cyclopropyldihydroargablin 383 have been determined by X-ray analysis. A conformational analysis of several 11,13-oxetane lactones has been carried out.…”