Table 2.

¹³C NMR (125 MHz in DMSO-d₆) data for compounds 1–5.

No.	δ 13C
	1	2	3	4	5
2	75.4, C	76.1, C	74.8, C	79.1, C	78.2, C
3	65.8, CH	59.9, CH	57.3, CH	58.9, CH	59.8, CH
4	134.7, CH	136,2 CH	132.1, CH	40.4, CH2	41.6 CH2
4a	137.6, C	136.3, C	137.8, C	79.2, C	81.7, C
5	189.7, C	187.7, C	188.3, C	194.4, C	183.4, C
5a	110.8, C	110.5, C	110.4, C	107.9, C	116.7, C
6	164.7, C	164.8, C	164.8, C	163.9, C	162.7, C
7	107.8, CH	108.1, CH	108.1, CH	108.5, CH	113.5, CH
8	165.7, C	165.3, C	165.6, C	165.7, C	163.8, C
9	107.7, CH	107.7, CH	107.9, CH	107.8, CH	108.3, CH
9a	136.5, C	135.9, C	135.9, C	135.1, C	136.4, C
10	195.5, C	195.3, C	194.9, C	199.5, C	196.0, C
10a	82.2, C	82.9, C	82.6, C	83.7, C	82.9, C
11	40.4, CH2	37.0, CH2	37.8, CH2	33.7, CH2	41.5, CH2
12	117.7, CH	50.5, CH	50.1, CH	48.6, CH	116.9, CH
13	138.9, C	70.5, C	70.1, C	70.1, C	140.6, C
14	35.5, CH2	41.2, CH2	41.3, CH2	41.2, CH2	39.7, CH2
15	32.9, CH2	31.1, CH2	30.8, CH2	30.5, CH2	23.7, CH2
16	73.4, CH	72.2, CH	72.4, CH	71.8, CH	126.5, CH
17	148.3, C	40.4, C	40.4, C	40.2, C	129.2, C
18	110.3, CH2	20.5, CH3	25.8, CH3	21.6, CH3	76.3, CH2
19	17.8, CH3	26.5, CH3	26.5, CH3	28.7, CH3	28.9, CH3
20	24.9, CH3	23.6, CH3	24.2, CH3	24.4, CH3	22.5, CH3
21	25.7, CH3	30.1, CH3	29.0, CH3	28.4, CH3	15.2, CH3
22	16.1, CH3	16.6, CH3	16.7, CH3	16.0, CH3	15.1, CH3