Table 2.

¹³C-NMR data of compounds 1–5 in ppm

COMPOUNDS
Carbon	1a	2b	3c	4d	5d
1	155.0	154.9	158.1	157.6	158.2
2	128.0	128.0	127.8	127.9	127.7
3	185.8	185.8	188.7	188.6	188.7
4	122.9	122.9	122.7	122.8	122.7
5	167.9	167.9	171.6	171.2	171.7
6	147.1	147.0	147.7	147.3	147.8
7	39.87	32.1	41.4	41.2	41.3
8	36.0	39.6	36.6	35.9	37.2
9	50.9	48.6	51.9	51.4	51.7
10	44.3	44.3	45.6	45.5	45.6
11	22.63	71.5	23.0	23.2	23.6
12	32.0	32.0	38.1	36.6	37.5
13	48.1	48.1	43.7	43.5	44.2
14	51.3	50.8	48.2	45.4	51.8
15	22.3	22.3	35.9	36.6	24.3
16	35.8	39.7	70.6	217.7	30.5
17	218.8	218.0	81.7	86.8	82.1
18	13.9	14.5	12.5	11.9	11.6
19	20.1	20.1	20.1	20.1	20.1
20	112.2	112.2	112.6	112.9	112.4

^a 125 MHz (CD₃)₂CO.

^b 150 MHz (CD₃)₂CO.

^c 125 MHz CD₃OD.

^d 75 MHz CD₃OD.