Table 2. ¹³C and ¹³C DEPT NMR Data of Compounds 1–4^a.

	1	2	3	4
position	δC, type	δC, type	δC, type	δC, type
1	226.9, C	225.6, C	227.3, C	218.0, C
2	128.0, CH	130.0, CH	139.6, CH	51.0, CH
3	76.8, CH	78.1, CH	80.3, CH	78.1, CH
4	44.0, C	43.6, C	45.5, C	39.1, C
5	40.0, CH	41.1, CH	43.6, CH	41.2, CH
6	32.9, CH2	34.3, CH2	34.4, CH2	32.0, CH2
7	175.9, C	174.3, C	176.4, C	175.0, C
8	77.6, C	76.3, C	134.4, C	140.4, C
9	87.3, C	86.6, C	83.2, C	56.3, CH
10	55.5, C	54.2, C	56.4, C	50.0, C
11	28.1, CH2	29.6, CH2	29.7, CH2	20.0, CH2
12	26.3, CH2	26.2, CH2	29.7, CH2	33.8, CH2
13	38.1, C	38.7, C	39.4, C	41.0, C
14	165.8, C	165.8, C	136.4, C	44.4, CH
15	119.0, CH	119.8, CH	34.3, CH2	29.2, CH2
16	166.0, C	165.3, C	172.1, C	172.0, C
17	79.1, CH	79.4, CH	81.6, CH	77.1, CH
18	20.0, CH3	21.0, CH3	16.6, CH3	20.5, CH3
19	26.0, CH3	21.1, CH3	19.3, CH3	14.5, CH3
20	121.0, C	120.3, C	121.0, C	121.4, C
21	140.8, CH	142.6, CH	143.8, CH	141.9, CH
22	109.0, CH	110.0, CH	110.4, CH	110.0, CH
23	142.5, CH	142.2, CH	145.0, CH	141.9, CH
28	22.6, CH3	21.4, CH3	22.8, CH3	21.0, CH3
29	45.1, CH2	47.0, CH2	47.2, CH2	18.0, CH3
30	145.3, CH	145.7, CH	135.0, CH	121.7, CH
MeO-7	51.2, CH3	51.7, CH3	52.4, CH3	50.8, CH3
1′	168.2, C	166.5, C	168.8, C	175.0, C
2′	129.1, C	137.0, C	129.0, C	74.2, CH
3′	141.4, CH	128.4, CH2	140.5, CH	31.1, CH
4′	13.1, CH3	17.8, CH3	14.5, CH3	15.0, CH3
5′	11.0, CH3		12.4, CH3	18.0, CH3

^aSpectra were recorded in methanol-d₄ at 150 MHz. Chemical shifts are given in ppm; assignments were confirmed by HSQC and HMBC experiments.