which long-range correlations were observed between
H-1
00
( 4.58) and C-3
0
( 87.4), as well as H-1
( 4.71)
and C-3
0
( 87.4). Moreover, the chemical shifts of C-3
,
C-2
0
and C-4
0
were changed by +9.3, 0.6 and 1.3 ppm,
respectively, relative to 4. Therefore, the structure of 5 was
elucidated as 3
3. Experimental
3.1. General
0
-O-b-glucopyranosyl-stilbericoside