Table 2.

The NMR spectral data (δ) for compounds 3–8^a.

No	3b		4		5c		6d		7		8
	δH	δC	δH	δC	δH	δC	δH	δC	δH	δC	δH	δC
1							11.29		10.82 s		10.92 s
2		127.9	7.39 s	126.8	7.45 s	124.7		139.0	7.20 s	124.6		137.5
3		135.5		105.8		104.5		99.8		108.3		109.1
3a		121.5		127.3		125.5		116.1		127.8		127.9
4	7.91 brd (7.8)	120.8	7.75 brd (8.4)	120.5	7.69 brd (7.8)	120.8		154.3	7.59 brd (7.8)	119.5	7.52 brd (7.8)	120.1
5	7.03 dt (1.2, 7.8)	120.7	7.00 dt (1.2, 8.4)	120.5	7.06 dt (1.2, 7.8)	120.7	6.48 d (8.0)	99.7	6.92 brt (7.8)	117.9	6.91 dt (1.2, 7.8)	118.2
6	7.17 dt (1.2, 7.8)	124.8	7.07 dt (1.2, 8.4)	122.8	7.17 dt (1.2, 7.8)	123.2	7.00 t (8.0)	123.3	7.01 brt (7.8)	120.4	7.04 dt (1.2, 7.8)	121.8
7	7.33 brd (7.8)	113.0	7.31 brd (8.4)	112.4	7.37 brd (7.8)	108.9	6.92 d (8.0)	105.4	7.30 brd (7.8)	110.9	7.29 brd (7.8)	111.6
7a		133.9		137.9		133.4		135.6		135.8		133.8
8			5.39 s	50.9	4.21 s	49.5	4.20 s	14.0	3.86 s	48.4	3.66 s	34.4
9				118.4				119.8

^aNMR data (δ) were measured in CD₃OD for 3–5 and in DMSO-d₆ for 6–8, at 600 MHz for ¹H and 150 MHz for ¹³C of 3–5, 7, and 8 and at 500 MHz for ¹H and 125 MHz for ¹³C of 6, respectively. Proton coupling constants (J) in Hz are given in parentheses. The assignments were based on ¹H—¹H COSY, HSQC, and HMBC experiments.

^bData for glucopyranosyl in 3: δ_H 4.81 (1 H, d, J = 7.8 Hz, H-1ʺ), 3.58 (1 H, dd, J = 9.6, 7.8 Hz, H-2ʺ), 3.44 (1 H, t, J = 9.6 Hz, H-3ʺ), 3.45 (1 H, t, J = 9.6 Hz, H-4ʺ), 3.28 (1 H, m, H-5ʺ), 3.91 (1 H, dd, J = 12.0, 2.4 Hz, H-6ʺa), 3.79 (1 H, dd, J = 12.0, 4.8 Hz, H-6ʺb); δ_C 107.4 (C-1ʺ), 75.3 (C-2ʺ), 77.7 (C-3ʺ), 71.2 (C-4ʺ), 78.3 (C-5ʺ), 62.5 (C-6ʺ).

^cData for methoxy in 5: δ_H 4.07 (3 H, s); δ_C 66.2.

^dData for methoxy in 6: δ_H 3.85 (3 H, s); δ_C 55.3.