Table 1.

Spectrum data for compounds 4e and 7e.

1H NMR Compound 4e Compound 7e	1H-1H COSY	Assignment
8.98 (s; 2H) 8.98 (s; 2H)	5.50 5.50	H-5 H-5
7.85 (d, J = 8.3; 2H) 7.85 (d, J = 8.3; 2H)	7.48 7.48	H-4′ H-4′
7.78 (dd, J = 8.4, 7.9; 2H) 7.79 (d, J = 8.0; 2H)	7.73, 7.35 7.75	H-12 H-13
7.73 (d, J = 8.3; 2H) 7.75 (dd, J = 9.0, 8.3; 2H)	7.78 7.79. 7.31	H-13 H-12
7.48 (dd, J = 7.6, 7.1; 2H) 7.48 (dd, J = 7.6, 6.5; 2H)	7.85, 7.35 7.85	H-3′ H-3′
7.43 (d, J = 8.0; 2H) 7.43 (d, J = 8.2; 2H)		H-10 H-10
7.35 (dd, J = 7.6, 7.3; 2H) 7.35 (dd, J = 7.7, 7.4; 2H)	7.79, 7.48	H-11 H-11
7.31 (d, J = 7.6; 2H) 7.31 (d, J = 7.7; 2H)	7.48 7.48	H-2′ H-2′
7.04 (s; 2H) 7.03 (s; 2H)		H-8 H-8
5.50 (s; 4H) 5.50 (s; 4H)	8.98 8.98	H-4a H-4a
3.74 (s; 6H) 3.74 (s; 6H)		H-6a H-6a
13C NMR	HSQC	HMBC	Assignment
160.31 160.31		3.74 3.74	C-7 C-7
153.38 153.38		7.85, 7.43, 5.50 7.85, 7.43, 7.31, 5.50	C-1′ C-1′
143.44 143.44		8.98 8.98, 7.03, 5.50	C-4 C-4
142.64 142.64		7.48, 7.04, 5.50 7.48	C-9 C-9
140.14 140.14		7.78, 7.48, 3.74 7.48, 3.74	C-13a C-13a
132.32 132.32	7.79 7.79	7.43 7.48, 7.35	C-12 C-12
126.68 126.66	8.98 8.98	8.98 8.98, 7.43, 7.31, 5.50	C-5 C-5
126.06 126.07	7.43	7.85, 7.43, 7.31, 5.50 7.85	C-4 C-10
125.51 125.50	7.43 7.48		C-10 C-3′
125.30 125.29			C-4a’ C-4a’
124.50 124.50	7.48 7.35	7.79, 7.35	C-3′ C-11
122.78 122.73	7.35	7.73 7.75	C-11 C-9a
117.24 117.24	7.04 7.03	7.04 7.03	C-8 C-8
115.55 115.56	7.73 7.75	7.73, 7.35, 7.04, 3.74 7.75, 7.35, 7.04, 3.74	C-13 C-13
114.51 114.52	7.85 7.85	7.31 7.31	C-4a’,8a’,9a C-4′
106.84 106.85	7.31 7.31	7.85 7.85	C-2′ C-2′
61.69 61.70	5.50 5.50	5.50	C-4a C-4a
29.59 29.59	3.74 3.74	3.74 3.74	C-6a C-6a
15 N NMR	1H-15N HSQC	1H-15N HMBC	Assignment
246.9 246.9		8.98, 7.04 8.98, 7.03	N-3 or N-1 N-1
146.9 146.9		7.04, 3.74 7.03, 3.74	N-6 N-6