¹³C NMR spectroscopic data of compounds 1–5.

	1a	2b	3c	4d	5b
1	129.5	131.3	128.0	121.2	133.3
2	110.3	113.4	116.9	115.1	107.7
3	146.7	146.6	153.2	148.1	151.9
4	150.1	142.9	145.8	145.4	144.9
5	113.7	115.8	111.0	112.3	112.8
6	123.3	132.1	141.1	138.3	121.2
7	202.9	36.2	190.9	66.9	121.4
8	42.8	48.9	211.6	36.6	145.4
9	11.6	16.5	28.8	9.9	19.8
1′	132.5	130.8	134.9	137.6	132.6
2′	111.3	111.2	113.0	112.2	109.3
3′	147.1	147.6	148.3	148.1	146.5
4′	141.0	150.4	146.1	145.4	144.7
5′	124.3	113.6	115.8	115.1	114.2
6′	123.8	126.5	121.0	121.4	119.5
7′	41.5	196.3	46.6	56.7	200.6
8′	37.7	212.6	52.0	36.6	55.0
9′	15.5	29.1	16.8	12.1	22.0
OCH3-3	56.0	56.1	56.5	56.2	56.0
OCH3-3′	56.1	56.2	56.3	56.2	55.8

^{a 13}C NMR data (δ) were measured in chloroform-d at 75 MHz.

^{b 13}C NMR data (δ) were measured in chloroform-d at 100 MHz.

^{c 13}C NMR data (δ) were measured in acetone-d₆ at 100 MHz.

^{d 13}C NMR data (δ) were measured in acetone-d₆ at 75 MHz.