Table 1.

The ¹H-NMR (500 MHz) and ¹³C-NMR (125 MHz) data of compound 1 (in CD₃OD).

Position	δC, Type	δH, Mult. (J in Hz)	1H–1H COSY	HMBC	NOESY
1	210.4, C
2	135.8, C
3	171.7, C
4	75.3, CH	4.49, d (1.0)		3	7, 2′
5	74.5, C
6	8.4, CH3	1.75, d (1.0)		1, 2, 3	1′
7	23.1, CH3	1.23, s		1, 4, 5	4
1′	69.4, CH	4.72, dd (8.6, 4.8)	2′	2, 3, 4, 2′, 3′	6, 2′, 3′
2′	36.6, CH2	1.86, dtd (14.2, 8.6, 5.5), 1.76, m	1′, 3′	3, 1′, 3′, 4′	4, 1′
3′	29.8, CH2	2.12, m	2′, 4′	1′, 5′
4′	131.6, CH	5.49, m	3′, 5′		3′
5′	126.7, CH	5.48, m	4′, 6′	3′	6′
6′	18.1, CH3	1.64, d (4.8)	5′	4′, 5′	5′