Table 2.

¹ H NMR spectroscopic data for compounds 1–3 (δ in ppm, mult., J in Hz)

		1 a		2 a		3 a
position		δH, mult (J in Hz)		δH, mult (J in Hz)		δH, mult (J in Hz)
1a		5.22 dd (16.2, 1.8)		1.09 t (7.2)		1.10 t (7.2)
1b		5.09 dd (10.2, 1.8)
2		6.36 dt (16.2, 10.2)		2.29 qd (7.2, 7.2)		2.30 qd (7.2, 7.2)
				2.29 qd (7.2, 7.2)		2.30 qd (7.2, 7.2)
3		6.31 dd (15.0, 10.2)		6.50 dt (15.0, 7.2)		6.51 dt (15.0, 7.2)
4		5.72 dd (15.0, 7.2)		6.76 ddt (15.0, 12.0, 1.2)		6.78 ddt (15.0, 10.2, 1.2)
5		4.06 m		7.20 d (12.0)		7.22 d (10.2)
6		3.70 t (7.8)
7		2.83 quintet (7.8)		5.43 s		5.44 s
8		5.61 dd (14.4, 7.8)
9		6.20 dd (14.4, 10.2)		6.41 dd (15.6, 1.8)		6.38 dd (15.6, 1.2)
10		6.23 ddt (15.0, 10.2, 1.2)		6.98 ddd (15.6, 5.0, 1.8)		6.79 dd (15.6, 6.0)
11		5.76 dt (15.0, 5.4)		4.25 br q (5.0)		3.85 qd (6.0, 1.2)
12a		4.08 dd (5.4, 1.2)		3.51 dd (10.8, 5.0)		3.55 dd (10.2, 6.0)
12b				3.48 dd (10.8, 5.0)		3.49 dd (10.2, 6.0)
13a		4.06 b		9.42 s		9.42 s
13b		3.70 t (7.8)
11-OCH3						3.31 s

^aMeasured in methanol-d₄ (600 MHz)

^bSignal without multiplicity was overlapped, and was picked up from HSQC experiment