Oligosaccharide isolated from roots of mullein Verbascum thapsus L., Scrophulariaceae: Bourquelot, Bridel, Compt. Rend. 151, 760 (1910); from birch wood, Betula verrucosa Ehrh., Betulaceae: Lindberg, Selleby, Acta Chem. Scand. 12, 1512 (1958). Structure: Wickstrm et al., Bull. Soc. Chim. Fr. 1956, 827. Review: D. French “The Raffinose Family of Oligosaccharides” in Adv. Carbohydr. Chem. 9, 180-181 (1954).