Table 1. ¹H (600 MHz) and ¹³C (100 MHz) NMR Data for Compounds 1 and 2 in DMSO-d₆.

	1		2
no.	δC	δH, mult. (J in Hz)	δC	δH, mult. (J in Hz)
1	159.8, C		159.9, C
2	89.0, CH	6.73, s	88.3, CH	6.79, s
3	155.3, C		155.5, C
4	57.7, CH	4.55, qd (6.7, 6.6)	54.3, CH	4.65, qd (6.9, 6.6)
5	64.1, CH	4.43, ddd (8.8, 8.0, 6.7)	24.7, CH2	2.21, m; 1.71, m
6	39.3, CH2	2.67, dd (16.9, 8.0);	31.4, CH2	2.84, m; 2.45, m
		2.63, dd (16.9, 8.8)
7	173.4, C		176.0, C
8	13.3, CH3	1.23, d (6.5)	20.0, CH3	1.31, d (6.4)
1′	163.7, C		163.7, C
2′	116.2, CH	5.98, m	116.2, CH	5.98, m
3′	158.7, C		158.7, C
4′	28.0, CH3	2.03, d (1.2)	28.1, CH3	2.03, s
5′	21.0, CH3	2.25, d (1.2)	21.1, CH3	2.25, s