. Author manuscript; available in PMC: 2011 Sep 24.

Published in final edited form as: J Nat Prod. 2010 Sep 24;73(9):1559–1562. doi: 10.1021/np100430r

Table 1.

¹H and ¹³C NMR Data for Compounds 1, 2, and 4 (500 and 125 MHz)^a

position	1 (methanol-d₄)		2 (methanol-d₄)		4 (methanol-d₄)
position	¹H	¹³C	¹H	¹³C	¹H	¹³C
1	7.24 s	127.9	7.23 s	127.7	7.31 s	128.1
1a		113.8 ^b		113.7		113.8
2		121.8 ^b		122.0		122.0
3		162.2		162.4		162.3
4	6.29 s	98.7	6.27 s	98.5	6.28 s	98.5
4a		157.3		157.4		157.5
6	4.22 dd (10.7, 4.6) 3.57 t (10.7)	67.5	4.23 dd (10.7, 4.6) 3.56 t (10.7)	67.5	4.22 dd (10.7, 3.6) (6α) 3.55 t, (10.7) (6β)	67.6
6a	3.49 ddd (10.7, 7.0, 4.6)	41.5	3.49 ddd (10.7, 7.0, 4.6)	41.4	3.51 m	41.4
6b		121.8 ^b		120.9		120.5
7	6.81 s	106.0	6.81 s	105.9	6.74 d, (8.1)	115.4
8		143.2^b		143.6	6.50 d (8.1)	105.8
9		149.4 ^b		149.3		150.2
10	6.37 s	94.2	6.37 s	94.1		131.7
10a		155.5 ^b		155.4		156.4
11a	5.47 d (7.0)	80.3	5.47 d (7.0)	80.3	5.49 d (6.3)	80.6
1′	3.07 dd (14.9, 7.5) 3.37 m	35.3	2.98 dd (14.9, 7.5) 3.33 overlapped	34.7	3.31 m 2.99 dd, (15.3, 7.8)	34.8
2′	5.31 t (7.5)	85.4	5.20 t (7.5)	87.8	5.20 t (8.75)	87.9
3′		143.2 ^b		145.6		145.8
4′	4.15 s	62.6	1.75 s	17.1	1.75 s	17.2
5′	5.21 br s	110.8	5.05 br s	112.0	5.05 brs	112.1
-OCH₂O-	5.85 d (1.2) 5.88 d (1.2)	102.5	5.85 br d (0.8) 5.88 br d (0.8)	102.4
OCH₃					3.82 s	56.9

All assignment were based on the COSY, HSQC and HMBC experiments

The ¹³C NMR shifts of C-1a, C-2, C-6b, C-8, C-9, C-10a and C-3′ for compound 1 were observed by HMBC.