ISOFLAVONOIDS PRODUCED BY IRIS-PSEUDACORUS LEAVES TREATED WITH CUPRIC CHLORIDE

Iris pseudacorus leaves treated with cupric chloride produced fungitoxic stress metabolites. They were found to be 10 isoflavones [5,2'-dihydroxy-6,7-dimethoxyisoflavone (irilin A), 5,7,2'-trihydroxy-6-methoxyisoflavone (irilin B), 5,7,2'-trihydroxyisoflavone (irilin C), iristectorigenins A and B, tectorigenin, 3'-O-methylorobol, pratensein, biochanin A and genistein] and six coumaronochromones [5,7-dihydroxy-6-methoxycoumaronochromone, 5,7-dihydroxycoumaronochromone, 5,7,3'-trihydroxycoumaronochromone, 5,7,4'-trihydroxy-6-methoxycoumaronochromone (ayamenins A-D respectively), 5,7,3'-trihydroxy-6-methoxycoumaronochromone and lupinalbin A]. Irilins A-C and ayamenins A-D are new compounds. This is the first report on stress metabolites from the Iridaceae.