Tannins and related compounds CIII. Isolation and characterization of new monomeric, dimeric and trimeric ellagitannins, calamansanin and calamanins A, B and C from Terminalia calamansania (Blanco) Rolfe - Tanaka,T.; Morita,A.; Nonaka,G.; Nishioka,I.; Ho,F. (Chem. Pharm. Bull., 1991)