Table 2.

¹H NMR data of compounds 1–3, 5, and 7–9 (J in Hz).

No.	1 a	2 b	3 b	5 b	7 c	8 c	9 c
1	1.15, m 3.06, dd (12.7, 4.4)	1.56, t (11.9) 2.55, dd (12.5, 4.3)	1.40, t (12.0) 2.49, dd (12.4, 4.4)	1.27, overlap 3.09, ddd (12.1, 4.5, 2.8)	1.85, t (11.7) 2.77 ddd (11.8, 3.7, 2.4)	1.76, t (12.0) 3.01, dd (12.6, 4.3)	1.71, dd (13.2, 11.7) 2.23, ddd (13.3, 4.0, 2.5)
2	3.82, ddd (11.5, 9.6, 4.4)	3.83, ddd (11.7, 9.6, 4.3)	3.78, ddd (11.6, 9.6, 4.4)	5.42, tt (11.7, 4.5)	5.22, tt (11.5, 3.9)	5.04, tt (11.6, 4.1)	5.50, tt (11.7, 3.9)
3	3.01, d (9.6)	3.02, d (9.6)	2.99, d (9.6)	1.86, overlap 1.27, overlap	1.14–1.23, m 1.97, ddd (12.4, 4.1, 2.4)	1.88, m 1.24, overlap	2.03, ddd (12.7, 4.0, 2.5) 1.49, t (12.3)
5	1.15, m	1.89, dd (13.4, 4.2)	1.32, dd (12.4, 2.4)	1.50, dd (12.8, 2.4)	2.15, dd (10.5, 2.0)	2.41, s	2.34, dd (6.1, 4.6)
6	2.20, m 1.64, m	2.64, m 2.64, m	1.84, m 1.71, m	2.54, m 1.86, overlap	2.24 ddd (15.9, 6.5, 2.0) 2.35 dd (15.9, 10.5)	4.77, s	2.46, ddd (17.8, 4.6, 1.5) 1.94, ddd (17.8, 6.1, 1.5)
7	4.79, dd (10.2, 7.5)	-	2.71, m 2.82, m	2.87, m 2.76, m	5.94 d (6.5)	-	9.19, t (1.5)
8	-	-	-	-	-	-	6.57, s
11	-	6.76, s	6.65, s	6.68, s	6.69, s	6.71, s	-
12	6.36, d (1.2)	-	-	-	-	-	6.86, s
14	-	7.80, s	6.75, s	6.85, s	6.70, s	7.91, s	-
15	2.97, m	3.22, sept (6.8)	3.16, sept (6.8)	3.18, sept (6.8)	3.08, sept (6.8)	3.16, sept (6.8)	3.16, sept (6.9)
16	1.10, s	1.19, d (6.8)	1.16, d (6.8)	1.17, d (6.8)	1.18, d (6.8)	1.23, s	1.20, d (6.9)
17	1.08, s	1.21, d (6.8)	1.15, d (6.8)	1.17, d (6.8)	1.19, d (6.8)	1.24, s	1.18, d (6.9)
18	1.07, s	1.06, s	1.07, s	1.02, s	0.86, s	1.07, s	0.94, s
19	0.91, s	0.98, s	0.89, s	0.93, s	0.96, s	1.05, s	1.23, s
20	1.40, s	1.27, s	1.19, s	-	-	-	-
2-OCOCH3	-	-	-	2.02, s	2.05, s	2.06, s	1.99, s

^a Recorded in CDCl₃, 400 MHz; ^b recorded in methanol-d4, 400 MHz; ^c recorded in CDCl3, 500 MHz.