Four new pyranoanthocyanins, namely pyranocyanin A and a and pyranodelphini
n A and B, with the pyrano[4,3,2-de]-1-benzopyrylium core structure were is
olated together with known cyanidin 3-rutinoside and delphinidin 3-glucosid
e from black currant seed and their chemical structures were elucidated by
means of 2D NMR and ES-MS. (C) 2000 Elsevier Science Ltd. All rights reserv
ed.