Table 2.

¹H (400 MHz) and ¹³C NMR (100 MHz) data for 2 in DMSO-d₆.

Position	δH, mult. (J in Hz)	δC	Type	COSY	HMBC
1-NH	10.37, br s	-			C-2, C-3a
2	-	178.0	C
3	-	72.3	C
3a	-	131.0	C
4	7.19, d, (9)	125.5	CH	H-5	C-6, C-3, C-3a
5	7.09, dd, (9, 2)	123.8	CH	H-4
6	-	121.6	C
7	6.93, d, (2)	112.3	CH
7a	-	144.4	C
8	3.05, d, (18)	50.0	CH2		C-9, C-3a, C-2
	3.33, d, (18)
9	-	205.3	C
10	2.0, s	30.4	CH3		C-9, C-8
11-OH	6.07, br s	-