Table 2.

¹³C NMR spectroscopic data for 1 to 6 at 100 MHz (δ in ppm).

No.	1 a	2 a	3 a	4 a	5 b	6 a
1	171.0, C	172.1, C	13.7, CH3	15.3, CH3	171.7, C	170.6, C
2	119.1, CH	119.1, CH	123.7, CH	121.8, CH	116.6, CH	118.8, CH
3	155.2, C	155.0, C	134.9, C	135.3, C	160.1, C	155.5, C
4	130.6, CH	130.6, CH	131.6, CH	126.8, CH	51.1, CH2	130.6, CH
5	142.2, C	142.1, C	135.1, C	137.2, C	133.5, C	142.3, C
6	49.9, CH2	49.9, CH2	49.8, CH2	48.8, CH2	128.0, CH	50.0, CH2
7	32.1, CH	32.2, CH	32.1, CH	32.1, CH	38.9, CH	32.1, CH
8	37.8, CH2	37.9, CH2	38.0, CH2	38.0, CH2	175.7, C	37.9, CH2
9	27.9, CH2	28.9, CH2	28.2, CH2	28.1, CH2	17.9, CH3	32.1, CH2
10	27.8, CH2	31.2, CH2	27.0, CH2	27.0, CH2	15.9, CH3	26.9, CH2
11	31.0, CH2	24.8, CH2	35.0, CH2	35.0, CH2	18.4, CH3	36.1, CH2
12	32.4, CH2	42.6, CH2	74.1, CH	74.1, CH		71.0, CH
13	38.1, CH	86.5, C	47.5, CH	47.5, CH		56.2, CH
14	80.2, CH	36.5, CH2	179.7, C	179.5, C		175.1, C
15	58.2, CH	44.6, CH	17.0, CH3	24.2, CH3		19.9, CH3
16	172.1, C	179.5, C	17.9, CH3	17.8, CH3		18.5, CH3
17	19.8, CH3	19.8, CH3	20.0, CH3	19.9, CH3		19.8, CH3
18	18.5, CH3	18.5, CH3	13.9, CH3	13.8, CH3		61.6, CH2
19	19.9, CH3	19.9, CH3
20	15.3, CH3	25.5, CH3
21	58.3, CH2	61.0, CH2
OMe					51.9, CH3	52.0, CH3

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