Table 2.

¹H and ¹³C NMR Data Methylated Compounds 10a, 10b, and 10c in CDCl₃/Methanol-d_4.

	10a		10b				10c
position	δCb	δHa (J in Hz)	δCb		δHa(J in Hz)		δCb		δHa(J in Hz)
2	155.0		159.2	157.2			158.0	156.0
3	119.5		124.3	122.8			125.6	125.3
4	177.0		164.9	164.8			155.7	157.0
5	134.6		117.2	115.9			128.5	128.5
6	132.7	7.51, s	133.4	134.0	7.44, s	7.49, s	139.6	139.7	8.15, s	8.14, s
7	78.4	4.63, d (10.2)	79.4	79.5	4.56, d (10.2)	4.21, d (10.2)	79.4	80.7	4.33, d (10.4)	4.33, d (10.4)
8	36.3	2.0, m	33.8	33.8	2.3, m	2.3, m	32.6	32.9	2.44, m	2.52, m
9	43.4	1.78, m	43.2	43.1	1.79, m	1.84, m	43.1	43.1	1.86, m	1.86, m
		1.02, m			1.04, m	1.06, m			0.96, m	0.96, m
10	33.7	1.69, m	32.3	31.9	1.72, m	1.72, m	32.4	32.5	1.88, m	1.88, m
11	89.2	2.92, d (12.0)	89.0	88.9	2.97, d (12.0)	2.87, d (12.0)	89.8	90.0	2.92, d (10.0)	2.94, d (10.0)
12	34.2	1.54, m	36.1	36.7	1.57, m	1.57, m	36.0	36.0	1.60, m	1.60, m
13	22.8	1.54, m	22.6	21.9	1.53, m	1.53, m	22.5	22.5	1.5, m	1.5, m
		0.82, m			0.85, m	0.85, m			1.1, m	1.1, m
14	13.0	0.84, t (7.2)	12.7	12.4	0.84, t (6.6)	0.84, t (6.6)	12.9	12.8	0.87, t (6.6)	0.87, t (6.6)
15	17.6	0.68, d (6.6)	17.5	17.8	0.80, d (6.6)	0.80, d (6.6)	17.6	17.6	0.81, d (6.6)	0.81, d (6.6)
16	17.7	0.77, d (6.6)	17.3	17.6	0.75, d (6.6)	0.68, d (6.6)	17.7	17.8	0.64, d (6.4)	0.67, d (6.6)
17	17.0	0.89, d (6.6)	16.8	17.0	0.91, d (6.6)	0.91, d (6.6)	17.2	17.2	0.90, d (6.6)	0.90, d (6.6)
1′	126.6		133.8	133.8			133.0	133.0
2′, 6′	128.9	7.56, d (7.2)	128.6	128.5	7.43, d (7.2)	7.43, d (7.2)	129.0	128.9	7.48, d (6.8)	7.48, d (7.5)
3′, 5′	128.3	7.33, t (7.2)	128.4	128.5	7.39, t (7.2)	7.39, t (7.2)	128.9	128.7	7.42, t (6.8)	7.42, d (7.5)
4′	127.8	7.25, t (7.2)	127.6	127.5	7.34, t (7.2)	7.34, t (7.2)	129.8	129.8	7.39, t (7.3)	7.39, t (7.3)
OCH3	66.8	4.01, s	64.5	64.5	4.08, s	4.08, s	61.7	62.1	3.36, s	3.37, s
OCH3	64.4	4.0, s	61.5	61.2	4.01, s	3.34, s	60.6	60.4	4.16, s	4.14, s

^a1H NMR spectra recorded at 600 MHz,

^b13C NMR spectra recorded at 100 MHz