“…~~~ Floribin, present in trace amounts in the bark of Fraxinus JEoribunda has been assigned the structure 5-hydroxy-6-methoxyc~umarin,~~~ the first report of a 5,6-dioxygenated coumarin from a natural source. However, 6,7-dioxygenated coumarins are commonly found in Fraxinus species and from the data presented for floribin the reviewer is of the opinion that it is impure scopoletin (249). The structures of obtusinol (250)245 and obtusinin (25 1)246 from Haplophyllum obtusifolium have been confirmed by Obtusoside ( 252) is obtusinin /3-~-glucoside.~~* Bungeidiol ( 253) is a constituent of H .…”