Table 2.

¹³C NMR spectral data of compounds 1, 2, and 4–6 (100 MHz in CDCl₃).

No.	1	2	4	5	6
1	35.2	40.0	39.6	40.8	38.1
2	18.7	19.0	18.9	17.9	18.1
3	40.5	41.5	41.6	38.4	41.0
4	37.2	35.0	35.7	37.4	37.0
5	91.6	61.4	67.6	96.0	96.3,
6		105.1	73.4	36.6	47.0
7	164.6	170.1	171.1	172.4	200.8
8	118.4	124.2	143.7	147.3	149.7
9	144.3	148.9	137.3	136.8	136.4
10	37.1	39.8	38.4	48.6	47.9
11	109.0	110.4	111.4	109.2	108.6
12	157.4	155.7	149.4	147.7	147.0
13	132.7	131.6	133.9	133.7	134.0
14	129.0	130.0	117.9	107.9	107.3
15	27.2	27.1	27.2	27.6	27.4
16	22.7	22.8	22.5	22.9	23.1
17	22.7	22.7	22.7	23.0	23.0
18	22.0	32.8	32.6	28.5	28.1
19	30.9	22.6	22.6	26.0	25.6
20	34.0	22.8	20.3	19.9	19.5
6-OCH3		56.5