¹H and ¹³C NMR data of 1–2 and 5 in CDCl₃^a.

Position	1		2		5
	δ H	δ C	δ H	δ C	δ H	δ C
1	4.50 d (6.5)	65.2	4.52 d (6.5)	65.4		170.9
2	5.56 dt (15.0, 6.5)	124.0	5.58 dt (15.0, 6.5)	124.1	5.83 d (15.5)	124.1
3	5.75 dt (15.0, 7.0)	136.2	5.78 dt (15.0, 6.5)	136.5	6.83 dt (15.5, 7.0)	146.5
4	2.06 m	32.0	2.06 mb	32.1	2.22 dt (7.0, 8.0)	31.0
5	1.40 m	28.4	1.42 dt (7.0, 3.5)	28.8	1.33 mb	24.8
6	1.40 m	28.4	1.42 dt (7.0, 3.5)	28.5	1.58 mb	27.9
7	2.06 m	32.0	2.06 mb	32.2	5.43 dt (11.0, 7.5)	130.6
8	5.75 dt (15.0, 7.0)	136.2	5.71 dt (15.0, 6.5)	133.2	6.04 t (11.0)	128.5
9	5.56 dt (15.0, 6.5)	124.0	5.65 dt (15.0, 6.0)	129.3	6.51 dd (15.0, 11.0)	125.0
10	4.50 d (6.5)	65.2	4.10 d (6.0)	63.9	5.65 dd (15.0, 7.0)	136.2
11					4.10 q (7.0)	71.9
12					1.48 m, 1.54 mb	36.9
13					2.26 m	26.6
14					1.33 mb	31.5
15					1.33 mb	22.3
16					0.93 t (7.0)	12.9
1-MeC̲O		170.9		171.0
	2.06 s	21.0	2.08 s	21.2
10-MeC̲O		170.9
	2.06 s	21.0

^aSignal multiplicity and coupling constants (Hz) are in parentheses. The assignments were based on HSQC, HMBC, and TOCSY/¹H–¹H COSY experiments; ¹H and ¹³C NMR were measured using NMR spectrometers operating at 700 MHz (¹H) and 175 MHz (¹³C) for compounds 1 and 2, and 600 MHz (¹H) and 150 MHz (¹³C) for compound 5.

^bOverlapped.