Table 3. ¹H NMR Data for Compounds 7–11 (400 MHz, DMSO-d₆).

	7	8	9	10	11
no.	δH, mult. (J in Hz)	δH, mult. (J in Hz)	δH, mult. (J in Hz)	δH, mult. (J in Hz)	δH, mult. (J in Hz)
2	7.36 s	7.39 s	7.40 s	7.31 s	7.42 s
6	7.42 s	7.44 s	7.43 s	7.38 s	7.49 s
7				5.31 s
8	4.25 dd (8.6, 3.9)	2.76 t (7.4)	2.81 t (5.7)
9	1.67 m	1.72 m	1.89 m	2.58 dq (18.0, 7.3)	2.82 q (7.2)
	1.45 m			2.31 dq (18.0, 7.3)
10	0.90 t (7.4)	3.42 t (7.4)	4.03 t (5.4)	0.91 t (7.3)	1.06 t (7.2)
11	3.79 s	3.83 s	3.82 s	3.73 s	3.78 s
12	2.15 s	2.16 s	2.15 s	2.29 s	2.29 s
15			2.00 s
7-OH				5.52 br s
13-OH	11.43 br s				13.32 br s