Table 1.

¹³C NMR data for compounds 1, 2, and 3.

C no.	115,a	1a	2a	3b
1	171.3 qC	171.3 qC	171.3 qC	171.3 qC
2	70.7 CH	70.8 CH	70.8 CH	72.9 CH
3	83.4 CH	83.3 CH	83.1 CH	84.7 CH
4	47.8 CH	47.7 CH	47.9 CH	49.5 CH
5	214.6 qC	214.9 qC	216.2 qC	217.6 qC
6	48.5 CH	48.3 CH	49.8 CH	51.1 CH
7	80.1 CH	80.1 CH	79.2 CH	79.9 CH
8	131.6 qC	132.0 qC	136.2 qC	139.0 qC
9	132.0 CH	131.7 CH	129.4 CH	129.8 CH
10	46.2 CH	46.1 CH	45.9 CH	46.5 CH
11	211.5 qC	211.7 qC	211.9 qC	212.7 qC
12	42.6 CH2	42.7 CH2	42.5 CH2	44.3 CH2
13	68.9 CH	68.8 CH	69.0 CH	69.3 CH
14	81.6 qC	81.6 qC	81.6 qC	85.0 qC
15	210.8 qC	211.0 qC	211.2 qC	216.5 qC
16	46.9 CH	47.0 CH	46.9 CH	46.4 CH
17	77.8 CH	77.7 CH	77.7 CH	78.4 CH
18	62.7 qC	62.7 qC	62.6 qC	63.9 qC
19	67.1 CH	67.0 CH	67.0 CH	67.4CH
20	31.1 CH	31.1 CH	30.9 CH	32.4 CH
21	129.7 CH	129.4 CH	129.6 CH	131.6 CH
22	125.5 CH	125.5 CH	125.4 CH	126.2 CH
23	13.5 CH3	13.4 CH3	13.3 CH3	13.3 CH3
24	14.6 CH3	14.5 CH3	14.4 CH3	15.3 CH3
25	14.7 CH3	14.5 CH3	15.0 CH3	15.6 CH3
26	10.8 CH3	10.7 CH3	10.2 CH3	10.5 CH3
27	16.3 CH3	16.2 CH3	16.4 CH3	15.7 CH3
28	63.5 CH2	63.5 CH2	63.5 CH2	65.7 CH2
29	63.2 CH2	63.2 CH2	62.8 CH2	64.8 CH2
30	11.1 CH3	11.0 CH3	10.9 CH3	11.5 CH3
31	18.6 CH3	18.4 CH3	18.3 CH3	18.7 CH3
32	60.3 CH3	60.3 CH3	60.3 CH3	60.3 CH3
33	169.5 qC	169.9 qC	—	—
34	21.6 CH3	21.5 CH3	—	—
35	173.5 qC	173.7 qC	173.6 qC	—
36	34.2 CH2	34.1 CH2	34.0 CH2	—
37	29.0 CH2	29.0 CH2	29.1 CH2	—

^aMeasured in CDCl₃. ^bMeasured in CD₃OD.