Table 2.

¹H and ¹³C NMR Data of 2 and 2a in CD₃OD

No.	2		2a
	δH (J in Hz)a	δC, typeb	δH (J in Hz)c	δC, typed
1		174.4, C		179.1, C
3	3.63, t (7.7)	42.4, CH2	3.77, t (7.9)	42.3, CH2
4	2.87, t (7.7)	27.1, CH2	3.01, t (7.9)	26.0, CH2
4a		137.6, C		136.4, C
5	6.52, s	118.2, CH	6.85, s	116.7, CH
6		167.6, C		158.3, C
7		151.1, C		149.2, C
8	7.15, s	112.2, CH	7.42, s	114.1, CH
8a		112.3, C		116.9, C
9	Disappeared	33.0e	Disappeared	33.1e
10	1.72, m	26.9, CH2	1.73, m	26.3, CH2
11	1.60, m	29.9, CH2	1.61, m	29.9, CH2
12	3.20, t (6.9)	40.0, CH2	3.20, t (6.9)	39.6, CH2
1′		173.3, C		173.4, C
2′	1.91, s	22.6, CH3	1.90, s	22.5, CH3
7-OMe	3.85, s	56.4, CH3	3.95, s	57.0, CH3

^aMeasured at 600 MHz

^bMeasured at 150 MHz

^cMeasured at 800 MHz

^dMeasured at 200 MHz

^eDetected by HMBC