HYDROXYCINNAMIC ACID-ESTERS FROM BROCCOLI FLORETS

Four conjugates of gentiobiose were isolated, from fresh, raw broccoli florets, using mild extraction conditions and preparative HPLC. From spectroscopic evidence the structures were characterized as two novel conjugates of gentiobiose: 1,2'-disinapoyl-2-feruloylgentiobiose and 1 -sinapoyl-2-feruloylgentiobiose and, two compounds previously reported to be present in the fruits of Boreave orientalis, a member of the Cr uciferae, 1,2,2'-trisinapoylgentiobiose and 1,2-disinapoylgentiobiose. (C) 1997 Elsevier Science Ltd. All rights reserved.