Table 1.

¹H (500 MHz) and ¹³C (125 MHz) nuclear magnetic resonance (NMR) data of 1 and 2.

Position	1 (DMSO-d6)		Position	2 (CDCl3)
	δC, Type	δH (J in Hz)		δC, Type	δH (J in Hz)
1	156.6, C		1	118.0, CH	6.94 (d, J = 8.5 Hz)
2	122.6, C		2	134.8, CH	7.72 (d, J = 8.5 Hz)
3	143.2, C		3	134.0, C
4	123.5, CH	6.28 (s)	4	156.9, C
4a	150.6, C		4a	121.6, C
4b	153.5, C		5	166.4, C
5	111.7, CH	5.90 (d, J = 2.0 Hz)	7	69.1, CH2	5.11 (s)
6	165.6, C		7a	125.9, C
7	101.3, CH	6.19 (d, J = 2.0 Hz)	8	121.2, CH	6.40 (s)
8	163.3, C		9	135.6, C
8a	109.7, C		10	117.8, CH	6.87 (s)
8b	114.1, C		11	147.4, C
9	45.6, C		11a	141.0, C
10	190.2, C		12a	154.0, C
11	167.5, C		13	64.3, CH3	3.91 (s)
12	19.8, CH3	2.10 (s)	1’	190.7, C
1’/8’	125.9, C		2’	124.1, CH	6.66 (s)
2’/7’	115.5, CH	6.15 (s)	3’	158.8, C
3’/6’	144.1, C		4’	21.7, CH3	2.26 (s)
4’/5’	131.0, C		5’	28.3, CH3	2.01 (s)
4’a/4’b	137.3, C		1’’	21.0, CH3	2.25 (s)
8’a/8’b	117.7, C
9’/10’	19.9, CH3	1.34 (s)
3’/6’-OH		8.95 (s)
4’/5’-OH		9.00 (s)