Table 1. ¹H and ¹³C NMR Data for Companeramides A (1) and B (2) in CDCl₃ (700 MHz).

	companeramide A (1)			companeramide B (2)
unit	position	δH, mult. (J, Hz)	δC, mult.	unit	position	δH, mult. (J, Hz)	δC, mult.
AMOYA	1		174.3, C	AMOYA	1		175.4, C
	2	2.51, dq (7.2, 7.2)	46.4, CH		2	2.63, m	46.0, CH
	3	3.97, m	51.2, CH		3	3.81, m	52.4, CH
	3-NH	6.75, br d (6.5)			3-NH	7.44, d (6.0)
	4	1.71, obs	31.3, CH2		4	1.93, m	30.2, CH2
		1.63, obs				1.73, m
	5	1.54, m	25.2, CH2		5	1.53, m	25.5, CH2
		1.48, obs				1.45, m
	6	2.17, obs	17.9, CH2		6	2.18, m	18.0, CH2
	7		83.8, C		7		83.4, C
	8	1.89, t (2.6)	68.6, CH		8	1.91, obs	69.4, CH
	9	1.31, d (7.5)	14.2, CH3		9	1.36, obs	14.2, CH3
N-Me-Val-1	10		170.1, C	N-Me-Val-1	10		170.2, C
	11	4.58, d (11.2)	62.8, CH		11	4.72, d (11.2)	62.4, CH
	12	2.29, obs	25.6, CH		12	2.27, m	26.5, CH
	13	0.95, d (6.4)	19.4, CH3		13	0.96, obs	19.9, CH3
	14	0.88, d (6.7)	18.4, CH3		14	0.81, obs	18.5, CH3
	15	3.14, s	30.2, CH3		15	3.23, s	30.9, CH3
Ala	16		174.4, C	Val-1	16		173.4, C
	17	4.72, obs	46.2, CH		17	4.58, dd (8.3, 7.8)	55.5, CH
	17-NH	8.86, d (6.3)			17-NH	8.84, d (7.8)
	18	1.32, d (7.0)	16.4, CH3		18	2.13, m	30.5, CH
N-Me-Leu	19		169.4, C		19	0.91, obs	18.8, CH3
	20	4.67, dd (9.7, 4.9)	58.6, CH		20	0.93, obs	18.7, CH3
	21	1.83, ddd (14.5, 8.5, 4.9)	36.7, CH2	N-Me-Ala-1	21		169.8, C
		1.59, m
	22	1.41, obs	24.2, CH		22	4.96, q (6.8)	56.1, CH
	23	0.92, d (6.6)	22.2, CH3		23	1.32, d (6.8)	15.3, CH3
	24	0.91, d (6.8)	24.3, CH3		24	2.74, s	29.1, CH3
	25	2.69, s	28.8, CH3	Pro	25		171.8, C
Pro	26		172.4, C		26	4.83, obs	55.4, CH
	27	4.92, dd (7.4, 6.4)	55.4, CH		27	2.10, m	29.8, CH2
						2.04, m
	28	2.11, m	29.6, CH2		28	2.29, m	25.6, CH2
		2.00, m				1.97, m
	29	2.28, obs	25.6, CH2		29	3.83, m	48.0, CH2
		1.94, m				3.72, m
	30	3.84, m	48.0, CH2	Ile	30		170.2, C
		3.76, dt (9.9, 7.5)
Ile-1	31		170.0, C		31	4.76, m	54.4, CH
	32	4.74, dd (8.9, 6.9)	54.0, CH		31-NH	7.48, d (8.5)
	32-NH	6.91, d (8.9)			32	1.70, obs	39.0, CH
	33	1.69, obs	38.6, CH		33	0.93, obs	15.5, CH3
	34	0.92, d (6.5)	15.4, CH3		34	1.39, m	24.7, CH2
						1.06, m
	35	1.39, m	24.3, CH2		35	0.87, obs	11.7, CH3
		1.06, obs
	36	0.83, dd (7.5, 4.8)	11.0, CH3	N-Me-Val-2	36		169.3, C
N-Me-Val-2	37		169.5, C		37	4.90, d (11.1)	62.0, CH
	38	4.71, obs	61.7, CH		38	2.33, m	25.8, CH
	39	2.27, obs	25.7, CH		39	0.98, obs	19.9, CH3
	40	0.94, d (6.3)	19.9, CH3		40	0.78, d (6.5)	18.7, CH3
	41	0.77, d (6.8)	17.9, CH3		41	3.06, s	30.8, CH3
	42	3.06, s	30.5, CH3	Val-2	42		172.4, C
Ile-2	43		172.3, C		43	4.67, dd (9.3, 8.9)	54.7, CH
	44	4.72, obs	53.0, C		43-NH	6.80, d (9.3)
	44-NH	6.92, d (8.8)			44	2.00, m	31.1, CH
	45	1.74, obs	37.3, CH		45	0.93, obs	19.2, CH3
	46	0.84, d (6.7)	15.0, CH3		46	0.91, obs	18.4, CH3
	47	1.48, obs	23.4, CH2	N-Me-Ala-2	47		170.3, C
		1.07, obs
	48	0.82, dd (7.4, 5.0)	11.0, CH3		48	5.40, q (7.0)	52.2, CH
N-Me-Ala	49		170.1, C		49	1.35, obs	13.8, CH3
	50	5.26, q (7.3)	51.7, CH		50	2.89, s	30.7, CH3
	51	1.31, d (7.3)	13.5, CH3	Hiva	51		170.8, C
	52	2.92, s	30.5, CH3		52	4.80, d (7.7)	75.5, CH
Hiva	53		171.1, C		53	2.19, m	30.1, CH
	54	4.80, d (8.3)	75.4, CH		54	1.08, d (6.9)	18.2, CH3
	55	2.19, obs	30.1, CH		55	1.00, d (6.5)	18.2, CH3
	56	1.04, d (6.6)	18.6, CH3
	57	0.93, d (5.7)	17.8, CH3