Chemical and Pharmaceutical Bulletin 1989-Nov
Camelliin B and nobotanin I, macrocyclic ellagitannin dimers and related dimers, and their antitumor activity.
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Keywords
Abstract
Camelliin B and nobotanin I, dimeric hydrolyzable tannins of a new class having macrocyclic structures, were isolated from Camellia japonica and Heterocentron roseum, respectively. Nobotanin G and H of the structures related to nobotanin I, were also obtained from H. roseum. Camelliin B and also woodfordin C, a macrocyclic dimer from Woodfordia fruticosa, exhibited marked host-mediated antitumor activities.