Table 2.

¹³C NMR data of compounds 1–4 (δ in ppm)

No	1a	2a	3a	4b
1	35.7, CH2	35.4, CH2	34.9, CH2	35.0, CH2
2	34.6, CH2	34.8, CH2	34.5, CH2	34.6, CH2
3	214.8, C	214.1, C	213.9, C	214.1, C
4	47.9, C	47.8, C	47.3, C	47.3, C
5	52.5, CH	51.2, CH	51.3, CH	51.5, CH
6	22.1, CH2	23.9, CH2	36.8, CH2	36.8, CH2
7	25.8, CH2	118.2, CH	192.6, C	192.3, C
8	52.0, CH	149.8, C	144.6, C	141.6, C
9	169.6, C	163.6, C	169.7, C	170.6, C
10	38.4, C	36.3, C	36.2, C	36.2, C
11	116.5, CH	118.5, CH	120.2, CH	117.5, CH
12	173.8, C	171.9, C	168.5, C	169.1, C
13	128.7, C	128.6, C	146.4, C	123.2, C
14	45.9, C	44.2, C	54.0, C	50.1, C
15	31.6, CH2	28.7, CH2	31.2, CH2	31.1, CH2
16	19.1, CH2	18.9, CH2	23.8, CH2	22.7, CH2
17	36.3, CH	37.1, CH	50.7, CH	145.5, C
18	190.4, CH	190.0, CH	111.5, CH2	14.4, CH3
19	21.0, CH3	20.8, CH3	19.0, CH3	19.2, CH3
20	36.1, CH	36.0, CH	32.0, CH	35.8, CH
21	19.0, CH3	19.0, CH3	17.7, CH3	19.7, CH3
22	32.9, CH2	32.3, CH2	33.7, CH2	34.9, CH2
23	28.9, CH2	28.8, CH2	27.1, CH2	28.5, CH2
24	142.0, CH	142.1, CH	141.9, CH	141.8, CH
25	129.1, C	129.0, C	129.4, C	129.0, C
26	170.6, C	170.6, C	170.9, C	170.6, C
27	21.6, CH3	22.2, CH3	21.5, CH3	21.6, CH3
28	24.5, CH3	28.9, CH3	19.9, CH3	20.3, CH3
29	21.9, CH3	21.5, CH3	21.1, CH3	21.2, CH3
30	26.3, CH3	25.7, CH3	25.8, CH3	25.8, CH3

^aRecorded at 125 MHz, in pyridine-d₅. ^bRecorded at 200 MHz, in pyridine-d₅