Table 3.

¹H (500 MHz) and ¹³C NMR (125 MHz) Data for 18 and 19 in DMSO-d₆.

No	18		19
	δC, type	δH (J in Hz)	δC, type	δH (J in Hz)
1	73.6, CH	3.91, d, 1 H (5.6)	73.6, CH	3.91, d, 1 H (5.6)
2	113.1, C		113.1, C
3	147.1, C		147.1, C
4	120.8, C		120.8, C
5	131.3, CH	6.58, s, 1 H	131.3, CH	6.59, s, 1 H
6	90.1, C		90.1, C
7	39.4, CH2	3.61, d, 1 H (18.2); 3.20 d, 1 H (18.2)	39.4, CH2	3.61, d, 1 H (18.3); 3.21, d, 1 H (18.3)
8	154.5, C		154.1, C
9	158.8, C		158.8, C
10		8.49, t (5.7, 5.8)		8.52, t (5.5, 5.6)
11	38.5, CH2	3.13, m, 2 H	38.7, CH2	3.11, m, 2 H
12	26.2, CH2	1.43, m, 2 H	29.1, CH2	1.44, m, 2 H
13	26.9, CH2	1.38, m, 2 H	23.6, CH2	1.23, m, 2 H
14	39.9, CH2	2.96, m, 2 H	28.5, CH2	1.38, m, 2 H
15		7.08, t (4.9, 4.9)	40.1, CH2	2.94, m, 2 H
16	156.7, C			7.11, t (5.5, 5.5)
17			156.7, C
1-OH		6.36, d (7.1)		6.39, d (7.1)
3-OCH3	59.6, CH3	3.65, s, 3 H	59.6, CH3	3.64, s, 3 H
16-OCH3	51.1, CH3	3.50, s, 3 H
17-OCH3			51.5, CH3	3.50, s, 3 H