TY - JOUR
T1 - Tannins and Related Compounds. LIX.1)Aesculitannins, Novel Proanthocyanidins with Doubly-Bonded Structures from Aesculus hippocastanum L.
AU - Morimoto, Satoshi
AU - Nonaka, Gen Ichiro
AU - Nishioka, Itsuo
N1 - Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1987
Y1 - 1987
N2 - A chemical examination of the seed shells of Aesculus hippocastanum L. has led to the isolation of proanthocyanidins A-6 (10) and A-7 (11), and aesculitannins A (12), B (13), C (14), D (15), E (16), F (17) and G (18). On the basis of chemical and spectroscopic evidence, proanthocyanidins A-6 (10) and A-7 (11) have been determined to be A-type dimers each possessing a C-4, C-6 interflavanoid linkage, while aesculitannins A (12), B (13), C (14), D (15), E (16), F (17) and G (18) have been characterized as oligomeric proanthocyanidins possessing A-type unit(s) in each molecule. In addition, the presence of (— )-epicatechin (1), proanthocyanidins B-2 (2), B-5 (3), A-2 (4), A-4 (5) and C-l (6), epicatechin-(4β→6)-epicatechin-(4β→6)-epicatechin (7), and cinnamtannins B1(8) and B2 (9) was also demonstrated.
AB - A chemical examination of the seed shells of Aesculus hippocastanum L. has led to the isolation of proanthocyanidins A-6 (10) and A-7 (11), and aesculitannins A (12), B (13), C (14), D (15), E (16), F (17) and G (18). On the basis of chemical and spectroscopic evidence, proanthocyanidins A-6 (10) and A-7 (11) have been determined to be A-type dimers each possessing a C-4, C-6 interflavanoid linkage, while aesculitannins A (12), B (13), C (14), D (15), E (16), F (17) and G (18) have been characterized as oligomeric proanthocyanidins possessing A-type unit(s) in each molecule. In addition, the presence of (— )-epicatechin (1), proanthocyanidins B-2 (2), B-5 (3), A-2 (4), A-4 (5) and C-l (6), epicatechin-(4β→6)-epicatechin-(4β→6)-epicatechin (7), and cinnamtannins B1(8) and B2 (9) was also demonstrated.
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U2 - 10.1248/cpb.35.4717
DO - 10.1248/cpb.35.4717
M3 - Article
AN - SCOPUS:85010155662
VL - 35
SP - 4717
EP - 4729
JO - Chemical and Pharmaceutical Bulletin
JF - Chemical and Pharmaceutical Bulletin
SN - 0009-2363
IS - 12
ER -