Table 13.

NMR¹H spectra of 16p–16r (CDCl₃ for 16o and DMSO-d6 for 16p,q; δ).

№	16p	16q	16r
Structure
H-14	s 7.24	s 7.22	s 7.12
H-17	s 8.30	s 8.33	s 7.68
H-19	m 8.21		d 6.69 (J = 3.3 Hz, AB-system)
H-20			d 6.66 (J = 3.3 Hz, AB-system)
H-21	s 7.45	m 7.34
H-22	m 7.21	m 7.13
H-23	m 7.21	m 7.13	s 7.62
H-24	d 7.83 (J = 2.7 Hz)	m 8.10
H-25			d 7.52 (J = 7.5 Hz)
H-26		s 2.51	m 7.21–7.30
H-27			m 7.21–7.30
NH	s 12.08	s 12.00	---
NH (HetAr)	s 11.59	s 11.51
OH-3	bs 18.82	bs 18.82	s 18.76
OH-7	s 13.03	bs 13.05	---
OH-9	s 10.30	s 10.31	s 10.26