“…They have extremely diverse structures, which are divided into simple coumarins, pyranocoumarins, furanocoumarins, and other coumarins. (1,21,22) At present, a total of 35 coumarins, primarily furanocoumarins and pyranocoumarins, have been identified from S. divaricata (Appendixes 4 and 5). Among them, the 17 furanocoumarins isolated include bergapten (18), byakangelicin (19), deltoin (20), imperatorin (21), isoimperatorin (22), isobergapten (23), marmesin (24), methoxy-8-(3-hydroxymethylbut-2-enyloxy)-psoralen (25), nodakenetin (26), oxypeucedanin hydrate (27), phellopterin (28), psoralen (29), sapodivarin (30), xanthotoxin (31), 5-hydroxy-8-methoxypsoralen (32), nodakenin (33), and xanthoarnol (34).…”