Table 1.

¹H and ¹³C NMR data of 1 and 2.

	1		2
no.	δH, J (Hz)a	δCb	δH, J (Hz)a	δCb
1		168.9		168.9
3
4	7.83 d (7.8)	127.9	7.83 d (7.8)	127.9
5	7.49 overlapped	131.4	7.54 overlapped	131.6
6	7.21 t (7.8)	125.1	7.22 overlapped	125
7	8.45 d (7.8)	120.8	8.50 d (7.8)	120.8
8
9		175.4		174.4
10
11	5.04 dd (3.1, 8.7)	50.6	5.04 dd (3.1, 8.70)	50.1
12	2.51 dd (3.1, 15.0)	39.8	2.50 dd (3.1, 15.0)	38.5
	2.77 dd (8.7, 15.0)		2.80 dd (8.7, 15.0)
13		76.6		76.5
14	5.26 s	85.1	5.13 s	84.2
15
16		70.8		70.5
17		173.1		173
18
19		137.3		137.3
20	7.48 d (7.8)	115.1	7.50 overlapped	115.1
21	7.36 t (7.8)	129.4	7.39 t (7.8)	129.5
22	7.20 t (7.8)	123.3	7.21 overlapped	123.1
23	7.53 d (7.8)	124.5	7.52 overlapped	124.3
24		137.3		137.3
25	3.97 d (3.4)	76.2	3.98 d (3.4)	76.3
26	2.18 m	31.5	2.14 m	32
27	0.85 d (7.0)	14.8	0.89 d (7.0)	15.22
28	1.05 d (7.0)	18.2	1.04 d (7.0)	18.4
29	1.38 s	21.6	1.34 s	21.8
30	1.45 s	15.9	1.40 s	15.9
31		172.6		172.6
32			3.77 s	51.3

^aSpectra recorded at 400 MHz.

^bSpectra recorded at 100 MHz. Data based on ¹H, ¹³C, HSQC, and HMBC experiments.