79786-02-0Relevant academic research and scientific papers
Tannin and Related Compounds. Part 26. Isolation and Structures of Stenophyllanins A, B, and C, Novel Tannins from Quercus stanophylla
Nonaka, Gen-ichiro,Nishimura, Hiroaki,Nishioka, Itsuo
, p. 163 - 172 (2007/10/02)
Together with four known ellagitannins ( casuarinin, casuariin, castalagin, and castalin) containing the core of an open-chain form of D-glucose, three unusual and closely related tannins, stenophyllanins A, B, and C, have been isolated from the bark of Quercus stenophylla.Degradative and synthetic studies, in conjunction with (1)H n.m.r., (13)C n.m.r., and mass spectrometry, have led to the unequivocal assignments of the structures in which an ellagitannin (casuarinin or casuariin) moiety is attached through a carbon-carbon linkage to the A-ring (C-8 or C-6) of a flavan-3-ol unit.
Tannins of Casuarina and Stachyurus Species. Part 1. Structures of Pendunculagin, Casuarictin, Strictinin, Casuarinin, Casuariin, and Stachyurin
Okuda, Takuo,Yoshida, Takashi,Ashida, Mariko,Yazaki, Kazufumi
, p. 1765 - 1772 (2007/10/02)
Three novel C-glucosidic ellagitannins, casuarinin, casauriin, and stachyurin, and two additional new ellagitannins, casuarictin and strictinin, were isolated from the leaves of Casuarina stricta, and their structures elucidated on the basis of chemical and spectral evidence.Pedunculagin and tellimagrandin I were also isolated, and the structure having (S)-4,4',5,5',6,6'-hexahydroxydiphenoyl groups was established for pedunculagin.These seven ellagitannins isolated from C. stricta have been found also in Stachyurus praecox.
