Table 1.

The NMR data of compounds 1–3 and 6 (J in Hz).

No.	1 a		2 a		3 a		6 b
	δ C	δ H	δ C	δ H	δ C	δ H	δ C	δ H
1	166.9, C		164.5, C		164.3, C		166.1, C
2	124.2, C		120.7, C		120.3, C		121.4, C
3	126.3, CH	7.86, d (7.7)	126.6, CH	7.96, dd (7.7, 0.7)	126.3, CH	7.88, d (7.7)	126.8, CH	8.00, d (7.7)
4	124.2, CH	7.44, dd (7.7, 7.7)	124.4, CH	7.51, dd (7.7, 7.7)	124.5, CH	7.49, dd (7.7, 7.7)	123.9, CH	7.37, dd (7.7, 7.7)
5	113.7, CH	7.93, d (7.7)	115.1, CH	8.03, dd (7.7, 0.7)	114.9, CH	8.03, d (7.7)	114.6, CH	7.74, d (7.7)
6	149.2, C		149.2, C		149.4, C		150.1, C
7	140.5, C		140.8, C		140.6, C		141.8, C
8	163.7, C		164.2, C		164.3, C		165.1, C
9	105.6, C		113.3, C		105.1, C		107.1, C
10	139.7, C		139.5, C		139.9, C		140.0, C
11	146.8, C		147.0, C		146.8, C		147.2, C
12	112.5, CH	7.02, dd (7.7, 0.7)	112.4, CH	7.03, d (7.7)	112.6, CH	7.03, d (7.7)	112.1, CH	6.88, d (7.7)
13	114.9, CH	6.69, dd (7.7, 8.4)	114.9, CH	6.69, dd (7.7, 8.4)	115.1, CH	6.69, dd (7.7, 7.4)	115.4, CH	6.72, dd (7.7, 7.7)
14	119.5, CH	7.57, dd (8.4, 1.4)	119.4, CH	7.57, dd (8.4, 1.4)	119.4, CH	7.57, d (7.7)	120.3, CH	7.68, (7.7)
15	55.7, CH3	3.87, s	55.7, CH3	3.90, s	55.7, CH3	3.88, s	55.9, CH3	3.94, s
16			66.0, CH2	4.39, dd (11.2, 4.2); 4.27, dd (11.2, 5.6)	65.3, CH2	4.56, dd (14.0, 7.0)	52.4, CH3	4.03, s
17			69.2, CH	3.88, m	34.4, CH2	3.14, m
18			62.8, CH2	3.53, m	138.0, C
19					129.0, CH	7.38, d (7.7)
20					128.4, CH	7.31, dd (7.7, 7.7)
21					126.4, CH	7.22, dd (7.7, 7.7)
22					128.4, CH	7.31, dd (7.7, 7.7)
23					129.0, CH	7.38, d (7.7)

^a 700 MHz for ¹H, 175 MHz for ¹³C, DMSO-d₆, ^b 700 MHz for ¹H, 175 MHz for ¹³C, CDCl₃, TMS as an internal standard.