Table 1.

NMR data for compound 1 in DMSO-d ₆. (600 MHz for ¹H and 150 MHz for ¹³C)

Position	δ H, mult. (J in Hz)	δ C, mult.	HMBC (1H–13C)
2		91.2, C
3		168.6, C
5	3.87, m 3.10, m	45.8, CH2	2, 6, 7
6	2.65, m 2.35, m	33.1, CH2	2, 5, 7, 8
7		79.0, C
8		130.1, C
9	6.56, d (7.7)	111.9, CH	8, 11
10	7.08, t (7.7)	129.8, CH	12, 13
11	6.81, t (7.7)	119.9, CH	9, 10
12	7.33, d (7.7)	123.2, CH	2, 10, 13
13		148.2, C
15		138.3, C
16	7.58, d (8.0)	123.3, CH	15, 17, 20, 21
17	7.74, t (8.0)	132.9, CH	15, 16, 19
18	7.43, t (8.0)	126.2, CH	15, 16, 20
19	7.72, d (8.0)	130.2, CH	15, 17, 21
20		127.9, C
21		164.3, C
N-Me	3.43, s	36.4, CH3	3, 15
N-H	6.00, s		2, 3, 7, 8, 13
7-OH	6.49, s		2, 7, 8