Table 1.

Comparison of the chemical shifts obtained by NMR in the sample with literature standards of the AAI.

Carbon	Sample	4a,b	Sample	4a,c
1	125.23	124.5
2	113.10	112.2	7.76 s	7.80 s
3	146.60	146.0
4	146.94*	146.2
4a	117.75	116.9
4 b	130.80	129.8
5	119.38	118.4	8.59 d	8.66 d
6	132.55	131.5	7.79 t	7.68 t
7	109.86	108.7	7.31 d	7.07 d
8	157.28	156.3
8a	119.76	118.8
9	120.38	119.5	8.52 s	8.81 s
10	146.94*	145.7
10a	118.22	117.3
11	168.60	167.9
OCH2O	103.87	103.0	6.43	6.34 s
OCH3	57.18	56.2	4.00	4.01 s

Obs.: There was a shift of the signals of ¹³C NMR in comparison with literature data.

^aData from literature (Nascimento and Lopes, 2003).

^bSolvent: DMSO‑d_6.

^cSolvent: CDCl₃.