Table 2.

¹³C-NMR spectroscopic data of 1–4 (100 MHz, δ in ppm).

Position	1 a	2 a	3 a	4 b
1	147.1, C	87.8, C	88.0, C	158.8, C
2	120.1, CH	128.2, CH	128.3, CH	119.4, CH
3	52.0, CH	140.4, CH	140.8, CH	137.8, CH
4	83.4, C	72.8, C	73.4, C	133.3, C
5	38.5, CH2	36.5, CH2	41.0, CH2	195.1, C
6	34.7, CH2	35.2, CH2	25.4, CH2	45.7, CH2
7	88.9, C	219.3, C	76.0, CH	204.3, C
8	91.9, C	79.7, C	75.8, C	86.1, C
9	29.9, CH2	42.0, CH2	39.0, CH2	33.3, CH2
10	24,1, CH2	25.9, CH2	25.5, CH2	27.2, CH2
11	65.6, CH	150.3, CH	149.5, CH	143.6, CH
12	60.4, C	125.1, C	125.5, C	130.9, C
13	33.0, CH2	25.0, CH2	25.8, CH2	37.1, CH2
14	25.8, CH2	27.5, CH2	27.5, CH2	27.6, CH2
15	34.0, CH	38.4, CH	38.9, CH	36.3, CH
16	21.3, CH3	17.4, CH3	17.4, CH3	22.4, CH3
17	23.9, CH3	17.1, CH3	17.1, CH3	21.7, CH3
18	26.2, CH3	29.3, CH3	30.2, CH3	10.9, CH3
19	25.1, CH3	28.5, CH3	24.4, CH3	28.9, CH3
20	173.9, C	168.8, C	169.5, C	165.8, C

^a Measured in CD₃OD; ^b Measured in CDCl₃.