Table 3.

¹H NMR and ¹³C NMR for compound 8 and gymnastatin H in CDCl₃ (δ in ppm, J in Hz).

Pos.	8a		gymnastatin Hb
	δ H	δ C	δ H	δ C
1a	3.71, m	64.4, CH2		172.3, C
1b	3.61, dd (5.2, 10.8)
2	4.22, m	53.3, CH	4.97, dt (7.8, 5.8)	53.3, CH
3	2.82, d (6.0)	36.2, CH2	a 3.06, dd (14.1, 5.8)	37.3, CH2
			b 3.13, dd (14.1, 5.8)
4	—	129.1, C	—	127.8, C
5/9	7.06, d (8.0)	130.2, CH	6.97, d (8.5)	130.5, CH
6/8	6.78, d (7.6)	115.6, CH	6.74, d (8.5)	115.5, CH
7	—	154.8, C	—	154.8, C
10	5.86, d (7.6)	—	5.94, d (7.8)	—
11	—	167.6, C	—	166.2, C
12	5.71, d (15.2)	117.2, CH	5.73, d (15.3)	117.1, CH
13	7.23, d (15.2)	147.1, CH	7.24, d (15.3)	147.2, CH
14	—	130.8, C	—	130.9, C
15	5.64, d (9.6)	148.2, CH	5.64, d (9.8)	148.2, CH
16	2.49, m	33.2, CH	2.51, m	33.2, CH
17a	1.27, m	37.2, CH2	1.26, m	37.3, CH2
17b	1.33, m		1.33, m
18	1.24, m	27.5, CH2	1.22, m	27.5, CH2
19	1.24, m	29.3, CH2	1.22, m	29.4, CH2
20	1.24, m	29.7, CH2	1.23, m	31.8, CH2
21	1.24, m	29.6, CH2	1.25, m	22.7, CH2
22	1.24, m	31.9, CH2	0.88, t (6.7)	14.1, CH3
23	1.33, m	22.7, CH2	1.75, s	12.5, CH3
24	0.88, t (6.4, 13.6)	14.1, CH3	0.97, d (6.6)	20.6, CH3
25	1.74, s	12.5, CH3	—	—
26	0.97, d (6.8)	20.5, CH3	—	—

^aSpectra were recorded at 400 MHz for ¹H and at 100 MHz for ¹³C in CDCl₃.

^bSpectra were recorded at 300 MHz ¹H and at 75 MHz for ¹³C in CDCl₃.