Table 1.

¹H NMR Data (500 MHz) for Briareolate Esters 1–3

position	1 a (J in Hz)	2 b (J in Hz)	3 b (J in Hz)
2	5.50, br d (8.0)c	5.51, br d (7.5)	4.98, d (9.5)
3α	2.48, dd (16.5, 11.0)	2.48, dd (16.0, 11.0)	2.13, m
3β	1.26, m	1.26, m
4α	2.29, m	2.35, m	2.22, m
4β	2.17, m	2.22, m	1.38, m
6	6.21, br s	6.13, br s	5.62, d (9.0)
7	7.68, br s	7.64, br s	5.96, d (9.5)
10	3.80, d (11.5)	3.70, d (11.0)	3.68, d (12.0)
11	2.28, m	2.15, m	2.26, m
12	3.77, br q (3.0)	4.82, br q (3.0)	5.13, m
13α	2.07, dt (16.0, 3.0)	2.18, dt (13.0, 3.0)	2.10, m
13β	1.89, dt (16.0, 3.0)	1.87, dt (13.0, 3.0)	2.10, m
14	4.81, br s	5.08, br s	4.92, t (3.0)
15	0.87, s	0.87, s	1.42, m
16	1.73, s	1.75, s	1.38, m
17	3.52, q (6.0)	3.51, q (6.5)	3.76, q (7.0)
18	1.24, d (7.0)	1.28, d (7.0)	1.36, d (7.0)
20	0.89, d (7.0)	0.78, d (7.0)	0.89, d (7.0)
OCH3	3.60, s	3.69, s	3.87, s
C-2 ester	2.20, m	2.22, m	2.20, m
	1.60, sextet (8.0)	1.64, m	1.61, m
	0.93, t (7.0)	0.93, t (7.0)	0.96, t (7.0)
C-12 ester		2.28, m	2.32, m
		1.62, m	1.69, m
		1.33, m	1.34, m
		1.33, m	1.34, m
		0.89, t (7.0)	0.93, t (7.0)
C-14 ester	2.00, s	2.04, s	1.98, s

^aMeasured in CD₃OD,

^bMeasured in CDCl₃.