Table 3. Analysis of the 13C-NMR spectral assignments.

Position	Carbons	Chemical shift (ppm)
1	CH3	20.78
2	C	126.227 to 128.535
3	CH	126.227 to 128.535
4	CH	146.797 to 147.111
5	C	158.18
6	CH	126.227 to 128.535
9	CH	56.008
10	C	126.227 to 128.535
11	CH	126.227 to 128.535
12	CH	126.227 to 128.535
13	CH	117.216
14	CH	126.227 to 128.535
15	CH	126.227 to 128.535
16	C	143.617
17	CH	108.658
18	CH	113.693
19	C	138.072
20	CH	135.966
21	CH	121.535
22	CH	148.176
24	C	146.797 to 147.111
25	C	149.466