Table 1.

¹H and ¹³C NMR data of 1 and 2 (500 MHz and 125 MHz) ^a.

No.	1 b		2 c
	δ C	δ H	δ C	δ H
1	176.4 s	-	173.8 s	-
2	46.7 t	2.48, d (15.5) 2.51, d (15.5)	45.5 t	2.56, d (15.2) 2.59, d (15.2)
3	73.0 s	-	72.1 s	-
4	41.2 t	3.01, d (13.1) 3.08, d (13.1)	40.8 t	3.10, brs
4a	136.3 s	-	136.2 s	-
5	140.8 d	7.70, mc	140.8	7.85, d (5.6)
6	119.6 d	7.68, mc	119.3 d	7.78, d (5.6)
6a	132.9 s	-	132.5 s	-
7	189.2 s	-	189.1 s	-
7a	116.6 s	-	116.3 s	-
8	159.7 s	-	159.6 s	-
9	139.2 s	-	138.8 s	-
10	134.4 d	7.84, d (7.3)	134.2 d	7.96, d (6.6)
11	120.1 d	7.72, d (7.3)	119.8 d	7.84, d (6.6)
11a	133.3 s	-	133.0 s	-
12	189.3 s	-	189.2 s	-
12a	116.6 s	-	116.4 s	-
12b	162.4 s	-	162.3 s	-
13	27.1 q	1.27, s	27.3 q	1.31, s
Sugar A, β-d-olivose
1A	72.7 d	4.92, brd (11.4)	72.2 d	5.03, brd (9.1)
2A	37.9 t	1.50, m2.38, m	37.3 t	1.56, m2.43, m
3A	78.0 d	3.68, m	77.5 d	3.89, m
4A	75.1 d	3.47, dd (9.3, 9.3)	75.3 d	3.46, dd (7.6, 7.8)
5A	75.6 d	3.56, m	74.6 d	3.67, m
6A	17.9 q	1.31, d (5.8)	17.6 q	1.26, d (5.6)
Sugar B
1B	91.0 s	4.97, brs	90.5 d	6.06, brs
2B	73.7 d	3.88, m	74.4 d	4.34, m
3B	32.6 t	1.92, m1.96, m	35.9 d	2.54, m
4B	64.1 d	4.12, m	171.4 s	-
5B	74.7 d	4.24, m	169.8 s	-
6B	11.5 q	1.26, d (6.9)	20.8 q	2.17, s

^a Residual signals of the solvent as a reference. ^b Measured in CD₃OD. ^c Measured in acetone-d₆.