J Nat Prod 1989 Jul-Aug;52(4):679-85

Plant metabolites. Structure and in vitro antiviral activity of quinovic acid glycosides from Uncaria tomentosa and Guettarda platypoda.

Aquino R, De Simone F, Pizza C, Conti C, Stein ML.

Dipartimento di Chimica delle Sostanze Naturali, Universita di Napoli, Italy.

A reinvestigation of the bark of Uncaria tomentosa afforded, in addition to the major quinovic acid glycosides 1-3, three further glycosides 4-6. The structures were elucidated by spectral and chemical studies. Furthermore, a series of antiviral tests were performed on all these glycosides and on the related glycosides 7-9, previously isolated from Guettarda platypoda.