Iridoid glycosides of plants of the genusIncarvillea I. 7-0-benzoyltecomoside fromIncarvillea olgae

Aucubin and five substances of iridoid nature designated as A, B, C, D, and E have been isolated from two species of plants — Lagotis integrifolia (Willd.) Schisk and Incarvillea olgae (Rgl.). The IR, UV, mass, PMR and¹³C NMR spectra of substance A have been studied, and an x-ray structural investigation has been made of its tetrahydro derivative. This has shown that substance A is 7-benzoyltecomoside.Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 61–69, January–February, 1995. Original article submitted November 1, 1994.