Table 2.

NMR data of compound (51) in DMSO-d6 at 300 K (¹H at 600 MHz, ¹³C at 150 MHz).

Compound (51)
Atom	δH (J in Hz)	δC	HMBC JH→C
1, 1′	-	153.0	-
2, 2′	-	128.3	-
3, 3′	7.51 (d, 2.0, 2H)	128.3	1, 2, 5, 7
4, 4′	-	137.8	-
5, 5′	7.17 (dd, 8.2, 2.0, 2H)	128.8	1, 3, 7
6, 6′	7.07 (d, 8.2, 2H)	120.6	1, 2, 4
7, 7′	2.89 (m, 4H)	36.6	3, 5, 9
8, 8′	2.97 (m, 4H)	36.2	4, 10, 14
9, 9′	-	141.0	-
10, 10′	-	119.9	-
11, 11′	-	156.6	-
12, 12′	6.75 (d, 7.9, 2H)	114.0	10, 11, 14, 15
13, 13′	7.20 (t, 7.9, 2H)	130.9	9, 11
14, 14′	6.76 (d, 7.9, 2H)	120.4	8, 10, 12, 15
15, 15′	13.27 (s, 2H)	170.7	-
16	5.55 (brs, 2H)	98.9	1
OH-11	10.43 (brs, 2H)	-	-

s: singlet, d: doublet, t: triplet, m: multiplet, br: broad.