A series of stilbene derivatives was isolated from the acetone extract
of one-year shoots of the Rkatsiteli grapevine. The structures of two
of these compounds were elucidated by H-1 NMR and C-13 NMR spectrosco
py and mass spectrometry. The compounds under study were shown to be t
etrameric 3,5,4'-trihydroxystilbene derivatives.