... : 3,4,5,7-Tetrahydroxyflavone; rhamnolutein; robigenin; swartziol; trifolitin.Molecular Formula and Molecular Weight : C15H10O6286.23 Melting Point and solubility: mp276-278,also ... in water, soluble in hot alcohol, ether and alkalies. Structural formula: Brief: yellow needle or brown yellow, belongs to the flavonol ...