Table 3.

¹H (600 MHz) and ¹³C NMR (125 MHz) NMR Data for xestoproxamine C (3) (CDCl₃)

No.	δC, mult.a	δH, mult (J in Hz, ax/eq)	DQF-COSY	HMBCb
1	53.1, CH2	2.93, dd (12.0, 12.0, ax)	2
		2.55, brd (12.0, eq)		2, 5
2	40.1, CH	2.03, m (ax)	1, 3, 30
3	34.0, CH	1.96, m (eq)	2, 4	1, 2, 4, 8, 9, 10
4	34.7, CH2	2.12, m (ax)	3, 5	2
		1.80, m (eq)
5	46.7, CH2	3.14, dd (12.0, 12.0, ax)	4
		2.80, m (eq)
6	60.0, CH2	2.76, m (eq)	7
		1.84, dd (12.0, 12.0, ax)
7	37.4, CH	1.60, m (ax)	6, 8, 20
8	37.9, CH2	2.43, m (eq)	7, 9	6, 7, 9, 10, 20
		1.00, ddd (12.0, 12.0, 12.0, ax)
9	44.9, CH	1.98, m (ax)	8, 10	8
10	59.9, CH2	2.98, brd (9.8, eq)	9
		2.17, m (ax)		6, 8
11	56.5, CH2	2.91, m	12	1, 5, 12, 13
12	22.0, CH2	1.65, m	11, 13	11, 13
		1.56, m		11, 13
13	26.8, CH2	1.40, m	12	11, 12
14	26.8–27.7	1.50-1.20, m
15	27.3, CH2	1.37, m
16	26.6, CH2	2.03, m	15, 17	15, 17, 18
		1.96, m		15, 17, 18
17	129.5, CH	5.44, m	16, 18	16
18	129.5, CH	5.41, m	17, 19	16
19	24.8, CH2	2.37, m	18, 20	17, 18, 20
		1.81, m		7, 17, 18, 20
20	34.1, CH2	1.51, m	7, 19	8, 18, 19
		0.93, m		6, 7, 8, 18, 19
21	55.0, CH2	2.70, m	22	10
		2.48, m		6, 10
22	27.9, CH2	1.58, m	21, 23	21, 23, 24
		1.48, m		21, 24, 31
23	30.5, CH	1.51, m	22, 24, 31
24	35.9, CH2	1.39, m	23, 25	22, 23, 31
		1.09, m
25–30	26.8–27.7	1.50-1.20, m
31	21.2, CH3	0.87, d (6.7)	23	22, 23, 24

^aAssigned from HSQC/HMBC.

^bb HMBC correlations, optimized for 8 Hz, are from proton(s) stated to the indicated carbon.