Table I.

¹³C-NMR spectra data of compounds 1–8 (δ, ppm; compounds 4 and 8 were detected at 75 MHz, others at 125 MHz; compounds 1, 2, 3, 4, 6 and 7 dissolved in CD₃OD, compound 5 dissolved in DMSO, and compound 8 dissolved in acetone-d₆; OMe, OCH3).

Compound no.	1	2	3	4	5	6	7	8
2	166.24	148.15	160.89	147.99	164.17	164.46	164.73	158.15
3	103.80	137.17	104.15	137.24	103.04	102.46	104.62	135.63
4	184.23	177.44	183.79	177.34	181.77	184.31	183.66	179.18
5	154.70	158.35	163.13	158.23	157.48	152.69	162.33	163.06
6	132.97	99.38	123.75	99.22	98.90	131.70	99.78	99.35
7	158.90	165.77	166.09	162.52	163.88	157.66	165.61	164.77
8	95.38	94.55	95.31	94.39	94.16	94.17	94.75	94.35
9	154.70	162.53	156.19	165.58	161.22	152.69	158.25	157.63
10	105.78	104.56	105.39	104.52	103.77	104.87	103.89	105.75
1′	123.78	123.81	124.69	148.77	121.38	122.14	122.31	122.43
2′	110.75	130.69	110.70	115.98	128.56	128.45	114.22	115.99
3′	149.52	116.35	149.58	124.14	116.05	116.15	146.78	145.68
4′	152.13	160.57	152.52	146.22	161.06	161.32	150.71	148.85
5′	116.81	116.35	116.86	116.22	116.05	116.15	116.01	116.56
6′	121.76	130.69	121.77	121.67	128.56	128.45	120.46	122.73
OMe	56.71		56.72			59.85
OMe	60.94
1′′								102.57
2′′								71.26)
3′′								71.97)
4′′								72.86)
5′′								71.19
6′′								17.63

The table values represent ¹³C-NMR spectra data of compounds 1–8. OMe represents OCH₃. NMR, nuclear magnetic resonance; DMSO, dimethyl sulfoxide.