Table 1.

¹³CNMR assignments for compounds 1 and 2^a

Position	1	2	Position	1	2
1	38.75	22.29	16	26.32	36.65
2	27.10	41.53	17	32.65	30.13
3	79.19	213.21	18	47.40	44.26
4	38.94	58.29	19	47.00	29.40
5	55.34	42.07	20	31.24	40.44
6	18.54	41.37	21	34.90	30.29
7	32.82	18.26	22	37.31	35.33
8	41.89	50.75	23	28.56	6.81
9	47.80	37.47	24	15.65	14.67
10	37.12	59.83	25	15.74	18.42
11	23.85	36.18	26	16.97	16.35
12	121.89	29.57	27	26.15	18.11
13	145.35	39.26	28	27.40	31.84
14	39.96	39.20	29	33.49	184.12
15	28.26	29.50	30	23.69	31.53

^a13CNMR spectra were obtained at 100 MHz, and recorded in CDCl₃ at room temperature.