Table 2.

NMR data for compound 6b.

1H-NMR (DMSO-d6)	1H-1H COSY		Assig.
12.22 (bs; 1H)			H-1
11.44 (bs; 1H)			H-1′
8.98 (s; 1H)			H-5″
7.84 (d, J = 6.8; 1H)	7.15		H-5′
7.51-7.49 (m; 2H)	7.40, 7.30, 7.15		H-7,7′
7.40 (m; 1H)	7.50		H-8
7.30 (d, J = 7.4; 1H)	7.50		H-8′
7.27 (bs; 1H)	2.31		H-5
7.15 (m; 1H)	7.84, 7.51		H-6′
6.86 (s; 1H)			H-3
6.22 (s; 1H)			H-3′
5.48 (s; 2H)			H-4a″
2.31 (s; 3H)	7.27		H-6a
13C-NMR (DMSO-d6)	HSQC	HMBC	Assig.
163.16			C-2′
161.27		7.84, 622, 5.48	C-4′
160.83			C-2
143.38		7.27, 6.86	C-4
142.39		8.98, 5.47	C-4″
138.66		7.84, 7.51	C-8a′
137.52		7.49, 7.27	C-4
133.18	7.49	2.31	C-7
131.79			C-6
131.02	7.51	7.84	C-7′
126.73	8.98	5.48	C-5″
123.17	7.27	2.31	C-5
122.49	7.84	7.29	C-5′
121.32	7.15	7.30	C-6′
117.81	6.86		C-3
115.92			C-4a/4a′
115.16	7.40	7.27, 6.91	C-8
114.42	7.30	7.15, 6.22	C-8′, 4a′/4a
97.93	6.22		C-3′
61.81	5.48		C-4a″
20.52	2.31	2.31	C-6a
15N-NMR (DMSO-d6)	HSQC	HMBC	Assig.
248.0		8.98	N-1″
151.6	12.29		N-1
144.0	11.43		N-1′