Table 14.

NMR ¹³C spectra of 16p–16r (CDCl₃ for 16o and DMSO-d6 for 16p,q; δ).

№	16n	16o	16r
Structure
C-17	140.39	140.29	132.95
C-18	111.35	107.42	148.80
C-19	130.13	135.76	108.17
C-20	137.11	139.52	114.29
C-21	111.95	110.99	153.82
C-22	121.59	120.63	131.35
C-23	120.59	120.46	123.92
C-24	122.64	121.83	134.78
C-25	124.02	124.02	127.90
C-26		11.53	129.91
C-27			122.03