Table 2.

¹³C-NMR (125 MHz, Chloroform-d), ¹H-NMR (500 MHz, Chloroform-d), and HMBC data for compound 3.

Position	13C-NMR	1H-NMR	HMBC
	δc (Multiplet)	δH (Multiplet, J in Hz)	H→C
1	30.7	1.85 (m), 1.39 (m)	C-2, C-3, C-20
2	19.8	1.61 (m), 2.44 (m)	C-4, C-10
3	36.7	1.74 (m), 1.51 (m)	C-1, C-4, C-18, C-19
4	46.3	---	---
5	38.1	2.41 (m)	C-4, C-9, C-10, C-18, C-19, C-20
6	29.7	1.52 (m)	C-4, C-10
7	24.2	2.50 (m)	C-5, C-8, C-9, C-14
8	144.1	---	---
9	80.7	---	---
10	39.0	---	---
11	21.7	2.05 (m), 1.41 (m)	C-8, C-9, C-10, C-12
12	25.0	1.92 (m), 1.42 (m)	C-9, C-11, C-15
13	79.1	---	---
14	127.0	6.07 (s)	C-7, C-9, C-13, C-15
15	32.1	1.88 (septet, J = 6.8)	C-12, C-14, C-16, C-17
16	17.4	0.95 (d, J = 6.8)	C-13, C-15, C-17
17	17.1	0.94 (d, J = 6.8)	C-13, C-15, C-16
18	184.0(s)	---	---
19	17.5(q)	1.26 (s)	C-3, C-4, C-5, C-19
20	19.1(q)	1.06 (s)	C-1, C-5, C-9, C-10