The substances were detected by ultraviolet absorption at 254 and 366 nm, and also by spraying with Dragendorff reagent and diphenylboryloxy-ethylamine 1% in methanol (Natural Reagent).
The substances were detected by ultraviolet absorption at 254 and 366 nm, and also by spraying with Dragendorff reagent and diphenylboryloxy-ethylamine 1% in methanol (Natural Reagent).