| Summary: | Cnicin was isolated from 18 species or subspecies of the subgenus Acrolophus (Cass.) Dobrocz.: Centaurea aplolepa Moretti subsp. aplolepa, C. aplolepa Moretti subsp. lunensis (Fiori) Dostal, C. arenaria Bieb. ex Wild. subsp. arenaria, C. arenaria Bieb. ex Wild, subsp. odessana (Prodan) Dostal, C. arenaria Bieb ex Wild. subsp. majorowii (Dumbadze) Dostal, C. calvescens Pančić, C. cineraria L. subsp. cineraria, C. cineraria L. var, circae Somm., C. diffusa Lam. var. brevispina Boiss., C. grisebachi (Nyman) Form. subsp. grisebachi, C. grisebachi (Nyman) Form. subsp. confusa (Halácsy) Dostal, C. leucophaea Jordan subsp. leucophaea, C. attica Nyman subsp. ossaea (Halácsy) Dostal, C. pallidior Halácsy subsp. palidior, C. pelia DC., C. rhenana Boreau subsp. savranica (Klokow) Dostal, C. tymphaea Hausskn subsp. tymphaea, C. tymphaea Hausskn subsp. brevispina Hausskn (Dostal. Chromatographic analysis has shown appearance of cnicin in 10 investigated species or subspecies of subgenus Acrolophus (Cass.) Dobrocz.: Centaurea attica Nyman subsp. drakiensis (Freyn, Sint.) Dostal, C. kartschiana Scop., C. aggregata Fisch. et Mey, C. cuneifolia Sibth. SM. subsp. pallida (Friv.) Hayek, C. exarata Boiss. ex Cosson., C. mantoudii Georg., C. orphanidea Heldr. Sart. ex Boiss, subsp. orphanidea, C. spinosa L. subsp. spinosa, C. transiens Halácsy, C. zuccariniana DC.
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