Studies on the constituents of the plants of Illicium species. II. Structures of phenolic components.

Ten phenolic compounds were isolated from leaves or timber of Illiciaceous plants, Illicium tashiroi MAXIM., I. arborescens HAYATA, and I. anisatum L., and their structures were determined 1-10 by spectroscopic and synthetic studies. Of the ten, 4-allyl-5-(3-methylbut-2-enyloxy)-1, 2-methylenedioxybenzene (7), 4-allyl-2-methoxy-6-(3-methyl-2-butenyl)phenol (9), and 4-allyl-2, 6-dimethoxy-3-(3-methyl-2-butenyl)phenol (10) are new compounds.