Table 3.

¹H (400 MHz) and ¹³C NMR (100 MHz) Spectroscopic Data of 7 and 8 (CDCl₃)^a

	7		8
carbon	δC	δH, mult. (J in Hz)	δC	δH, mult. (J in Hz)
1	153.9		162.9
2	110.1	6.27, s	104.3
3	143.7		148.1
4	111.0	6.42, s	113.2	6.42, s
4a	152.6		153.3
6	77.2		78.3
6a	120.7		119.8
7	109.8	6.68, s	109.6	6.68, s
8	152.9		158.7
9	139.6		138.6
10	129.0	8.14, s	129.8	8.41, s
10a	122.5		122.6
10b	110.0		109.1
11	16.0	2.23, s	15.9	2.29, s
12	27.3	1.60, s	27.6	1.59, s
13	27.3	1.60, s	27.6	1.59, s
1′	35.8	2.48, t (7.6)	36.9	2.93, t (7.2)
2′	30.8	1.60, m	31.4	1.59, m
3′	31.7	1.30, m	32.1	1.35, m
4′	22.8	1.31, m	22.7	1.35, m
5′	14.3	0.88, t (7.2)	14.2	0.87, t (7.2)
COOH			176.0
1-OH				12.6

^aAssignments confirmed by DEPT-135, HMQC, COSY, and HMBC NMR experiments.