Extraction procedure One hundred grams of dried aerial parts of the thirteen chamomile samples were clustered to fine powder and thensequentially extracted by cold maceration with petroleum ether(b.p. 40–60◦C) (3× 2.5 l), CHCl3(3× 2.5 l) and MeOH (3× 5 l) atroom temperature for 1 week. All extractions were done in tripli-cate. The extracts were concentrated under vacuum at 50◦C, usinga vacuum rotary evaporator and stored at −4◦C until used for fur-ther analyses. The methanol solutions were combined and dried toobtain a yield of extraction (see Table 2).