A new flavone diglycoside isolated from the aerial parts of Sideritis
lutoela was characterized as isoscutellarein 7-O-beta-D-glucopyranosyl
(1 --> 2)beta-D-xylopyranoside by means of spectral analyses, applying
2D NMR techniques and NOE experiments. Its presence in 15 other speci
es of Sideritis is described.