Table 1.

¹H (400 MHz) and ¹³C (100 MHz) NMR data of 1 and 2 in DMSO-d₆.

No.	1		2
	δC, Type	δH, (J in Hz)	δC, Type	δH, (J in Hz)
1	161.8, C		169.4, C
2	116.3, C		117.8, C
3	127.4, CH	7.75, dd (1.6, 7.7)	131.2, CH	7.99, d (8.3)
4	117.9, CH	6.85, m	123.5, CH	7.19, t (7.4)
5	133.9, CH	7.45, t (8.5)	133.8, CH	7.62, m
6	112.5, CH	6.85, m	127.4, CH	8.47, d (8.3)
7	147.1, C		140.0, C
8
9	42.1, CH2	3.76, d (16.4) 4.45, d (16.4)	163.0, C
10	109.9, C		122.4, C
11	156.6, C		129.5, CH	7.76, d (8.7)
12	97.1, CH	6.32, d (1.6)	115.9, CH	6.95, d (8.7)
13	157.2, C		161.9, C
14	106.3, CH	6.16, d (1.6)	115.9, CH	6.95, d (8.7)
15	132.8, C		129.5, CH	7.76, d (8.7)
16	41.7, CH2	2.80, d (15.9) 3.08, d (15.9)		12.09, d (10.6)
17	68.9, C		137.4, CH	7.64, m
18		8.42, s	100.2, CH	5.46, d (8.7)
19	21.3, CH3	1.20, s	167.4, C
20	55.3, CH3	3.80, s
13-OH		9.40, s