A molecular formula of C27H30O16 was assigned to compound 1 from its HRFABMS data (m/z611.4531 [M+1]
+). The UV spectrum (ìmax350 nm), which exhibited a bathochromic effect in alkali, was indicative of the presence of a phenolic functionality, and together with absorption bands at 3435, 1657, 1593, and 1465 cm-1 in the IR spectrum suggested that 1 was a flavonoid glycoside.