Table 2.

¹H- (600 MHz) and ¹³C- (150 MHz) NMR data of compound 18 in CD₃OD

Position	δH (int., mult., J in Hz)	δC
1	6.00 (1H, s)	80.4
2	–	194.6
3	5.27 (1H, s)	126.5
4	–	164.0
5	3.33 (1H, m)	49.7
6a 6b	3.24 (1H, dd, 12.9, 3.6) 2.50 (1H, dd, 12.9, 6.6)	25.6
7	–	122.4
8	5.00 (1H, m)	79.0
9a 9b	2.52 (1H, m) 0.90 (1H, t, 7.2)	43.1
10	–	44.2
11	–	163.0
12	–	172.0
13	1.87 (3H, s)	8.4
14	1.09 (3H, s)	12.3
15	2.09 (3H, s)	22.0
1′	–	176.8
2′	2.19 (3H, s)	20.6