Tab. 1.

¹³C NMR Chemical Shifts of compounds 1 and 2 (CDCl₃, 125 MHz, TMS).

#	Compound 1		Compound 2
	δc	HMBC of attached H	δc
1	37.3		37.3
2	31.7		31.7
3	71.8	C-1, C-2, C-4	71.8
4	42.3		42.3
5	140.8		140.8
6	121.6	C-4, C-7, C-10	121.7
7	31.9		31.9
8	31.9		31.9
9	50.2		51.1
10	36.5		36.5
11	21.1		21.1
12	39.8		39.8
13	42.7		42.3
14	56.4		56.8
15	24.4		28.2
16	27.5		29.4
17	52.9		56.1
18	11.8	C-12, C-13, C-14, C-17	11.8
19	19.4	C-1, C-5, C-10, C-11	19.4
20	42.4		35.5
21	12.5	C-17, C-20, C-22	18.7
22	70.7	C-17, C-20, C-21, C-23, C-24	33.7
23	33.1		24.3
24	45.7		49.5
25	147.0		147.6
26	112.6	C-24, C-27	111.4
27	17.7	C-24, C-25, C-26	17.8
28	27.0		26.5
29	12.1	C-24, C-28	12.1