Ampelopsin B is a stilbenoid dimer found in Ampelopsis glandulosa var. hancei (formerly Ampelopsis brevipedunculata var. hancei).[1][2]
^Oshima, Y (1990). "Ampelopsins A, B and C, new oligostilbenes of Ampelopsis brevipedunculata var hancei". Tetrahedron. 46 (15): 5121. doi:10.1016/S0040-4020(01)87819-4.
^Chemical determination of the absolute structures of resveratrol dimers, ampelopsins A, B, D and F. Yoshiaki Takaya, Ke-Xu Yan, Kenji Terashima, Junko Ito and Masatake Niwa, Tetrahedron, 2002, 58, pages 7259–7265, doi:10.1016/S0040-4020(02)00785-8