Name

R1

R2

(1) xanthotoxol

H

OH

(2) 5-hydroxy-8-methoxy psoralen

OH

OCH3

(3) oxypeucedanin hydrate

H

(4) bergapten

OCH3

H

(5) imperatorin

H

(6) cnidilin

OCH3

(7) isoimperatorin

H