Table 3.

The calculated and observed chemical shifts of the Schiff base.

Atom	Calculated	Observed
C1	187.9	170.3
C23	173.0	156.0
C3	172.0	150.7
C27	177.6	153.7
C33	161.6	147.5
C36	157.0	146.1
C16	143.3	139.1
C31	144.9	132.9
C18	144.7	132.9
C17	143.4	129.8
C19	137.0	128.6
C29	131.6	125.6
C21	130.3	121.9
C37	124.0	113.8
C35	123.3	113.0
C2	105.5	95.7
C5	15.1	12.5
H32	8.23	8.29
H28	8.31	9.54
H22	8.27	8.10
H20	7.95	7.90
H39	7.67	7.53
H24	7.52	7.41
H38	7.31	7.06
H25	7.38	7.26
H30	7.05	6.53
H4	6.57	6.05
H40	6.79	6.62
H12	5.93	10.95
H8	2.21	3.29
H6	2.43	3.29
H7	2.21	3.29