Table 1. ¹H (600 MHz) and ¹³C (150 MHz) NMR Data of 1−3.

Position	1a		2a		3b
	δC, type	δH, m (J in Hz)	δC, type	δH, m (J in Hz)	δC, type	δH, m (J in Hz)
1	194.1, C		193.7, C		193.9, C
2	129.4, C		130.4, C		134.2, C
3	156.9, C		155.6, C		152.9, C
3a	120.8, C		121.2, C		121.5, C
4	152.7, C		152.7, C		153.2, C
5	106.1, CH	6.24, d (2.1)	105.9, CH	6.24, d (2.1)	107.2, CH	6.32, d (2.1)
6	161.3, C		161.2, C		162.9, C
7	102.2, CH	6.51, d (2.1)	102.0, CH	6.48, d (2.1)	103.9, CH	6.64, d (2.1)
7a	133.9, C		134.3, C		134.4, C
8	107.4, C		107.6, C		112.8, C
9	155.1, C		155.2, C		148.3, C
10	106.7, CH	6.09, brs	106.7, CH	6.07, brs	115.4, CH	6.71, brs
11	138.2, C		138.0, C		140.4, C
12	106.7, CH	6.09, brs	106.7, CH	6.07, brs	113.6, CH	6.64, brs
13	155.1, C		155.2, C		157.2, C
14	21.2, CH3	2.12, s	21.3, CH3	2.10, s	21.5, CH3	2.18, s
15	55.5, CH3	3.71, s	55.6, CH3	3.71, s	56.0, CH3	3.74, s
1′	109.5, C		106.6, C		109.5, C
2′	158.0, C		156.2, C		158.3, C
3′	107.1, CH	5.92, brs	109.0, CH	6.22, brs	112.8, CH	6.50, brs
4′	144.5, C		141.2, C		142.5, C
5′	110.5, CH	6.34, brs	106.5, CH	5.78, brs	110.6, CH	6.38, brs
6′	160.1, C		156.8, C		156.7, C
7′	170.6, C		168.0, C		162.8, C
8′	133.7, C		133.9, C		137.4, C
9′	149.5, C		149.7, C		150.5, C
10′	102.4, CH	6.33, d (3.1)	102.3, CH	6.32, d (3.0)	103.6, CH	6.27, d (3.0)
11′	156.1, C		155.7, C		157.5, C
12′	105.2, CH	6.38, brs	105.3, CH	6.37, d (3.0)	106.8, CH	5.82, d (3.0)
13′	127.9, C		128.1, C		129.3, C
14′	21.6, CH3	2.09, s	21.6, CH3	2.06, s	21.3, CH3	2.23, s
15′	54.8, CH3	3.54, s	54.8, CH3	3.52, s	55.3, CH3	3.46, s
OMe−7′	—	—	51.7	3.64, s	—	—

^ameansured in DMSO-d₆.

^bmeansured in acetone-d₆.