Table 1.

Nuclear magnetic resonance (NMR) data of new metabolites 18–20 in CHCl₃-d.

	19 a		20 b
	δC, Mult.	δH, Mult.	δC, Mult.	δH, Mult.
1	173.6, C		174.3, C
2		5.49, br s		5.42, br s
3	53.3, CH	3.25, m	55.0, CH	3.20, m
4	44.8, CH	3.30, dd (5.7, 2.4)	48.4, CH	3.20, m
5	31.7, CH	2.79, m	34.8, CH	2.43, m
6	148.6, C		140.2, C
7	71.6, CH	4.10, d (10.1)	125.7, CH	5.48, m
8	51.8, CH	2.44, m	49.7, CH	2.58, d (9.6)
9	63.4, C		68.4, C
10	43.3, CH2	2.63, dd (13.4, 5.2) 2.43, m	44.2, CH2	2.73, dd (13.7, 4.4) 2.41, dd (13.7, 8.8)
11	13.2, CH3	1.02, m	13.5, CH3	1.18, br d (7.3)
12	114.1, CH2	5.28, br s 5.09, br s	20.0, CH3	1.75, q (1.3)
13	126.9, CH	5.85, dd (15.6, 9.8)	128.1, CH	5.85, ddd (15.5, 9.6, 1.3)
14	138.7, CH	5.22, ddd (15.6, 10.9, 4.8)	135.9, CH	5.22, ddd (15.5, 10.9, 4.8)
15	42.9, CH2	2.02, m 1.81, m	42.7, CH2	2.01, m 1.78, m
16	28.7, CH	1.45, m	28.7, CH	1.48, m
17	46.7, CH2	1.94, m 1.55, m	46.4, CH2	1.95, m 1.52, m
18	34.3, CH	2.63, m	34.4, CH	2.63, m
19	154.75, CH	6.52, dd (15.9, 6.9)	153.2, CH	6.46, dd (15.9, 6.9)
20	132.1, CH	7.05, br d (15.9)	132.9, CH	7.12, dd (15.9, 1.4)
21	196.6		198.1, C
22	26.2, CH3	1.04, m	26.1, CH3	1.02, d (6.9)
23	17.6, CH3	1.14, d (7.0)	17.6, CH3	1.13, d (6.9)
1′	129.2, C		129.5, C
2′/6′	130.3, CH	6.99, br d (8.4)	130.3, CH	6.99, br d (8.4)
3′/5′	115.6, CH	6.77, br d (8.4)	115.6, CH	6.77, br d (8.4)
4′	154.69, C	OH: 5.41, s	154.6, C	OH: 5.09, s

^a 500 Mhz for ¹H, 125 MHz for ¹³C, ^b 700 Mhz for ¹H, 175 MHz for ¹³C.