Table 1.

NMR spectroscopic data (600/150 MHz) for compounds 1–3.

Position	1, δC Type	1, δH Mult. (J in Hz)	2, δC Type	2, δH Mult. (J in Hz)	3, δC Type	3, δH Mult. (J in Hz)
1	135.2 C		135.6 C		134.7 C
2	150.9 C		151.8 C		147.5 C
3	100.82 CH	6.69, d (2.9)	101.4 CH	6.35, d (2.9)	100.0 CH	6.49, s
4	156.3 C		158.7 C		151.7 C
5	108.5 CH	6.51, d (2.8)	107.8 CH	6.31, d (2.9)	141.3 C
6	132.4 C		134.0 C		127.2 C
1′	159.3 C		160.7 C		160.8 C
2′	99.2 CH	5.93, brs	102.6 CH	6.39, brs	100.3 CH	6.02, brs
3′	158.2 C		159.8 C		159.4 C
4′	109.4 CH	6.18, brs	111.7 CH	6.60, brs	110.4 CH	6.24, brs
5′	139.5 C		141.3 C		141.4 C
6′	106.6 CH	6.08, brs	110.4 CH	6.29, brs	108.1 CH	6.15, brs
1″	100.76 CH	4.82, d (7.8)	102.3 CH	5.55, d (4.5)
2″	73.2 CH	3.06, m	73.4 CH	4.13, dd (6.4, 4.5)
3″	76.8 CH	3.20, dd (8.9, 8.8)	71.2 CH	4.06, dd (6.5, 3.2)
4″	69.8 CH	3.08, m	87.5 CH	4.10, dt (3.5, 3.5)
5″	77.3 CH	3.30, ddd (8.4, 6.4, 2.0)	63.2 CH2	3.69, dd (12.1, 3.4)
				3.63, dd (12.2, 3.8)
6″	60.8 CH2	3.68, d (11.0)
		3.40, d (11.0)
4-OMe	55.2 OCH3	3.73, s	55.8 OCH3	3.74, s	56.4 OCH3	3.81, s
5-OMe					61.0 OCH3	3.70, s
6-Me	16.2 CH3	2.02, s	16.5 CH3	2.03, s	9.8 CH3	1.98, s
3′-OH		9.27, brs
5′-Me	21.2 CH3	2.13, s	21.8 CH3	2.24, s	21.6 CH3	2.18, s
2″-OH		5.04, brs
3″-OH		5.04, brs
4″-OH		4.68, d (5.2)
6″-OH		4.60, brs

Compound 1 was measured in DMSO-d₆, Compounds 2 and 3 were measured in CD₃OD.