Table 1.

NMR data for compounds 1 (600 MHz, DMSO-d₆) and 2 (600 MHz, Methanol-d₄).

Compound 1				Compound 2
pos	C mult	(J in Hz)	HMBC a	C mult	(J in Hz)	HMBC a
1	173.2, C			168.4, C
2	30.7, CH2	2.28, t (6.6)	1, 3, 4	131.5, CH	6.76, s
3	25.5, CH2	1.60, quint (6.6)	1, 2, 4	144.2, C
4	38.5, CH2	2.99, quart (6.6)	2, 3, 5	44.2, CH2	5.06, dd (10.8, 4.2)	2, 3, 5, 6, 7′
N–H		5.84, brt (6.6)
5	157.4, C			174.2, C
6				169.1, C
OMe	51.2, CH3	3.58, s	1	52.7, CH3	3.68, s	5
1′	129.7, C			132.0, C
2′	116.8, C			126.3, CH	6.73, s	3′, 4′, 6′, 7′
3′	113.8, C			109.6, C
4′	144.7, C			143.7, C
5′	143.7, C			145.4, C
6′	113.7, C			113.5, C
7′	46.7, CH2	4.51, d (4.8)	1′, 2′, 6′	36.9, CH2	3.60, dd (13.8, 4.2 )	3, 4, 5, 1′, 2′, 6′
			5		2.98, dd (13.8, 10.8 )	3, 4, 5, 1′, 2′, 6′
N–H′		5.85, brt (4.8)

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