Table 1.

¹H (600 MHz) and ¹³C-NMR (150 MHz) spectroscopic data of compound 6 (CDCl₃, δ (ppm), J (Hz)).

Pos.	δH	δC	Pos.	δH	δC
1	1.57, m	32.6	20	1.99, m	40.4
	1.97, m
2	1.41, m	30.7	21	0.95, d, 6.5	21.2
3	4.02, m	67.5	22	5.09, dd, 15.3, 7.7	135.4
4	1.69, m	39.4	23	5.14, dd, 15.3, 7.0	132.2
	1.87, m
5	-	75.5	24	1.80, m	42.9
6	4.93, d, 5.4	73.5	25	1.40, m	33.1
7	5.26, d, 5.4	114.3	26	0.76, d, 6.5	20.3
8	-	145.9	27	0.76, d, 6.5	19.7
9	1.94, m	43.4	28	0.84, d, 6.7	17.6
10	-	37.3	1′	-	166.4
11	1.55, m	22.2	2′	6.33, d, 16.0	118.4
12	1.27, m	39.3	3′	7.58, d, 16.0	145.1
	1.68, m
13	-	43.9	4′	-	134.4
14	1.87, m	55.0	5′	7.46, d, 8.0	128.2
15	1.35, m	22.8	6′	7.30–7.31, m	128.9
	1.51, m
16	1.21, m	27.9	7′	7.30–7.31, m	130.4
	1.67, m
17	1.22, m	56.0	8′	7.30–7.31, m	128.9
18	0.53, s	12.5	9′	7.46, d, 8.0	128.2
19	1.08, s	18.5