## 3 Results
### Gas Chromatography Coupled to Mass Spectrometry (GC-MS)
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline  & & **RESIDUES EXTRACTS** & **Area 1** & **Area 2** & **Area 3** & **Area 4** & **Area 5** \\ \hline
**N.** & **IRT** & **FRT** & **COMPOUNDS** & **RC \%** & **RC \%** & **RC \%** & **RC \%** & **RC \%** \\ \hline
01 & 3.39 & 3.68 & 2-Propenoic acid methyl ester & - & - & 0.4 & - & 0.3 \\
02 & 3.47 & 3.79 & 2,3-Butanediol & 7.3 & 5.0 & - & 8.0 & - \\
03 & 3.50 & 3.72 & (S)-Isopropyl lactate & 6.5 & - & - & - & - \\
04 & 3.56 & 3.83 & 2,3-Pentanedione & - & - & 0.3 & - & 0.2 \\
05 & 3.79 & 4.05 & Pyruvic acid methyl ester & - & - & 1.3 & - & 0.8 \\
06 & 4.13 & 4.19 & & Furural & - & - & 0.7 & 4.8 & 1.1 \\
07 & 4.27 & 4.36 & 1,2-Diacetylhydrazine & - & - & 0.3 & - & - \\
08 & 4.85 & 5.14 & 2-Paramonethanol & 3.9 & - & 0.5 & 4.8 & 0.5 \\
09 & 5.42 & 5.49 & 4-Cyclopentene-1,3-dione & - & - & 0.4 & - & 0.3 \\
10 & 6.82 & 6.99 & 1,2-Cyclopentanedione & - & - & 0.4 & - & 0.4 \\
11 & 7.77 & 7.83 & 5-Methyl-2-Furanecarboxaldehyde & - & - & 0.3 & - & 0.2 \\
12 & 8.35 & 8.51 & 2,4-Dihydroxy-2,5-dimethyl-3(2H)-furan-3-one & - & - & 0.3 & - & 0.2 \\
13 & 15.91 & 15.95 & 2,3-Dihydroxy-benzofuran & - & - & 0.3 & - & 0.4 \\
14 & 20.66 & 20.76 & Butanedicio-acid hydroxyl diethyl ester (+ /-) & - & 3.7 & - & 4.0 & - \\
15 & 21.26 & 22.22 & 5-Hydrooxymethylfurural & - & - & - & 0.9 \\
16 & 25.44 & 25.74 & Hydrocoumarin & 4.6 & 7.7 & 1.0 & 8.5 & 1.8 \\
17 & 27.70 & 28.09 & Coumarin & 8.2 & 7.2 & 1.0 & 9.0 & 1.7 \\
18 & 33.09 & 33.16 & Benzenpropanoic acid 2-hydroxyethyl ester & - & 4.6 & - & 4.5 & 0.2 \\
19 & 33.25 & 33.34 & (-)Spathulen & 7.7 & 8.2 & 0.3 & 10.3 & - \\
20 & 39.08 & 39.35 & 1-((1S,3 aR,4R,7S,7S,7 aS)-4-Hydroxy-7-isopropyl-4-methylocthydro-1-H-irel-1-yl)ethanoneome & - & - & - & 3.4 & - \\
21 & 43.18 & 43.22 & (-)-Globul & 3.3 & 4.6 & - & 4.7 & - \\
22 & 46.99 & 47.06 & n-Hexadecanoic acid (palmitic acid) & 5.1 & 5.2 & - & 4.2 & - \\
23 & 47.74 & 47.78 & Hexadeconic acid ethyl ester (palmitic acid ethyl ester) & 3.9 & 3.9 & - & 3.5 & - \\
24 & 52.23 & 52.69 & (Z)-11-octadecenoic acid (cis-vaccenic acid) & 14.6 & 13.9 & 2.2 & 10.0 & 0.2 \\
25 & 52.94 & 53.07 & (Z)-9-Octadecenoic acid ethyl ester (ethyl oleate) & 9.9 & 8.5 & - & 6.4 & - \\
26 & 54.71 & 54.72 & & & - & 3.8 & - & 3.3 & - \\
27 & 61.44 & 63.20 & & 4-O-Methylmannose & - & - & 81.7 & - & 90.6 \\
28 & 62.09 & 62.57 & Hexadecanoic acid 2-hydroxy-1-hydroxymethyl ethyl ester & 5.5 & - & - & - \\
29 & 66.71 & 66.91 & 9-Octadecenoic acid (E,E,E)-1,2,3-propanetriyl ester & 15.8 & 16.0 & 8.5 & 10.6 & - \\
30 & 79.98 & 80.44 & \(\gamma\)-Sitosterol & - & 4.1 & - & - & - \\
31 & 81.98 & 82.00 & Lupeol & 3.7 & 3.7 & - & - & - \\ Total \% & & & & 100 & 100 & 100 & 100 & 100 \\ \hline \hline \end{tabular} Note: IRT = initial retention time; FRT = final retention time of the compounds obtained in the collection areas; RC % = relative content in percentage; Appendix A (Figures A11–A15) = chromatograms of the residue extracts in the five collection areas.  
\end{table} 
Table 6: Chemical compounds identified in the ethanolic extracts of the residues of _Dipteryx punctata_, in the five collection areas of the municipality of Mojiu dos Campos, Eastern Amazon, Brazil. In general, species of the genus _Dipteryx_ have coumarin in their chemical composition. In the seeds obtained from cumaru plants collected in areas 2, 3, 4, and 5, this compound was predominant, with percentages of over 90% (Table 7). Oleic acid was observed in _D. punctata_ seed extracts in areas 1 and 5, and stigmasterol was also identified in _D. punctata_ seed extracts in area 1 (Table 7).