薬用資源の研究 (第1報)
きささげ及びあめりかきささげの葉の有機酸に就いて
1955 年 75 巻 2 号 p. 171-172
詳細
1955 年 75 巻 2 号 p. 171-172
It has been clarified that the seeds of Catalpa ovata G. Don. contain p-hydroxybenzoic acid but there is no report as to the component of its leaves. Having heard that the said leaves were effective for the athlete's foot, examinations were made of the leaves of Catalpa ovata and C. bignonioides Walt. p-Hydroxybenzoic acid was obtained in 2% yield from the former while p-hydroxycinnamic acid was obtained in 1.5% yield from the latter. These organic acids were assumed to be present as their alkali salts. The distinction of these two species are difficult from outward appearance but can be differentiated by hairs, glandular hairs, and pigment cells.
