Table 1.

NMR data for 1 and 2.

Pos.	1			2
	δCa, Mult.	δHb (J in Hz)	HMBC	δCc Mult.	δHd (J in Hz)	HMBC
1	134.0, qC			126.6, qC
2	112.8, CH	6.90, s	1, 3, 4, 4a, 10b	112.8, CH	6.93, s	1, 3, 4, 10a, 10b, 12
3	153.8, qC			147.8, qC
4	128.0, qC			140.6, qC
4a	147.0, qC			138.8, qC
6	164.4, qC			164.8, qC
6a	98.9, qC			98.2, qC
7	165.0, qC			165.0, qC
8	99.5, CH	6.60, d (2.0)	7, 6a, 10a	101.3, CH	6.46, d (2.0)	6a, 9, 10
9	166.7, qC			165.3, qC
10	104.2, CH	7.28, d (2.0)	6a, 9, 10a	104.9, CH	7.37, d (2.0)	6a, 8, 9, 10b
10a	137.9, qC			132.8, qC
10b	111.0, qC			111.2, qC
11	55.4, CH3	3.96, s	9	55.7, CH3	3.67, s	3
12	55.2, CH3	3.67, s	3	24.5, CH3	2.75, s	1, 2, 10, 10a
13	24.8, CH3	2.78, s	1, 2
1′	105.4, qC
2′	195.9, qC
2′a	117.4, qC
3′	139.8, qC
4′	123.8, CH	6.88, d (7.8)	5′, 6′, 7′
5′	137.7, CH	7.45, t (7.8)	4′, 6′a
6′	109.8, CH	6.72, d (7.8)	2′a, 5′
6′a	170.0, qC
7′	16.7, CH3	2.53, s	2′a, 3′, 4′
8′	19.4, CH3	1.80, s	1′, 2′
OH-7		11.89, s	7, 8		11.95, s	6a, 7, 8

^a Recorded at 100 MHz in acetone-d₆; ^b Recorded at 400 MHz in acetone-d₆; ^c Recorded at 150 MHz in acetone-d₆; ^d Recorded at 600 MHz in acetone-d₆.