Table 1.

¹H (500 MHz) and ¹³C (125 MHz) NMR Data for Withawrightolide 1 in CDCl₃

Position	δc, type	δH (J in Hz)	Position	δc, type	δH (J in Hz)
1	217.7, C		15	24.1, CH2	1.73, m; 1.26, m
2	39.6, CH2	2.81, ddd (1.7, 5.4, 18.1) 2.14, d (18.1)	16	26.7, CH2	1.74, m; 1.42, m
3	16.0, CH	1.39, m	17	47.7, CH	1.75, m
4	17.2, CH2	0.065, dd (3.8, 5.8) 0.78, ddd (1.7, 5.8, 5.9)	18	13.0, CH3	0.72, s
5	36.0, C		19	15.0, CH3	1.12, s
6	73.1, CH	3.31, t (2.9)	20	39.8, CH	1.84, m
7	37.4, CH2	1.96, m; 1.27, m	21	60.7, CH2	3.87, d (13.3); 3.71, dd (3.3, 13.3)
8	29.3, CH	1.86, m	22	75.7, CH	4.64, brs
9	47.4, CH	0.97, ddd (3.4, 10.7, 12.2)	23	33.5, CH2	2.0, dd (1.7, 9.0); 1.90, m
10	52.6, C		24	69.5, C
11	22.2, CH2	1.42, m; 1.34, m	25	139.0, C
12	39.5, CH2	1.89, m; 1.31, m	26	165.4, C
13	43.3, C		27	130.3, CH2	6.75, s; 6.00, s
14	55.8, CH	1.15, m	28	25.9. CH3	1.42, s