## 3 Results
### Thermal Desorption-Gas Chromatography-Mass Spectrometry of the Melanin from Ochroconis lascauxensis
\begin{table}
\begin{tabular}{c c c c} \hline \hline
**Peak** & **Compound** & **Peak** & **Compound** \\ \hline
1 & Chloromethane + Sulfur & & \(n\)-Decylthiophene \\  & dioxide & 51 & \(n\)-Heptadecene \\
2 & Benzene & 52 & \(n\)-Heptadecene \\
3 & Pyridine & 53 & \(n\)-Heptadecane \\
4 & Toluene & 54 & 2-Pentadecanone \\
5 & \(n\)-Ethylbenzene & 55 & Pentadecanal \\
6 & Styrene & 56 & Tetradecanoic acid methyl ester \\
7 & Hexanoic acid methyl ester & 57 & \(n\)-Undecylbenzene \\
8 & \(n\)-Propylbenzene & 58 & \(n\)-Undecylthiophene \\
9 & Isocyanobenzene & 59 & \(n\)-Octadecene \\
10 & Phenol & 60 & \(n\)-Octadecane \\
11 & Benzenamine & 61 & 2-Hexadecanone \\
12 & Trimethylbenzene & 62 & Phenanthrene \\
13 & Benzofuran & 63 & Hexadecanal \\
14 & Butanedioic acid dimethyl & 64 & Pentadecanoic acid methyl ester \\  & ester & 64 & Pentadecanoic acid methyl ester \\
15 & Methylphenol & 65 & Pentyloctylbenzene \\
16 & \(n\)-Butylbenzene & 66 & Butylmonylbenzene \\
17 & \(N\)-Methylbenzenamine & 67 & Propyldecylbenzene \\
18 & \(N\),\(N\)-Dimethylbenzenamine & 68 & \(n\)-Dodecylbenzene \\
19 & Octanoic acid methyl ester & 69 & \(n\)-Nonadecane \\
20 & \(n\)-Pentlybenzene & 70 & 2-Heptadecanone \\
21 & \(n\)-Dodecene & 71 & Tetramethylfuran \\
22 & 2-Decanone & 72 & Heptadecanal \\
23 & Naphthalene & 73 & Hexadecanoic acid methyl ester \\
24 & Nonanoic acid methyl ester & 74 & Methylphenanthrene \\
25 & Benzothiazole & 75 & Decylphenol \\
26 & Quinoline & 76 & Hexadecanoic acid \\
27 & \(n\)-Hexylbenzene & 77 & Dibutyl phthalate \\
28 & \(n\)-Tridecene & 78 & \(n\)-Tridecylbenzene \\
29 & \(n\)-Tridecane & 79 & 2-Octadecanone \\
30 & Indole & 80 & \(n\)-Tridecylthiophene \\
31 & Methylnaphthalene & 81 & Octadecanal \\
32 & Decanoic acid methyl ester & 82 & \(n\)-Tetradecylbenzene \\
33 & Methylnaphthalene & 83 & \(n\)-Heneicosane \\
34 & Heptanedio acid dimethyl & 84 & 2-Nonadecanone \\
35 & \(n\)-Heptylbenzene & 85 & Octadecanentirile \\
36 & Methylquinoline & 86 & Hydroxyhexadecanoic acid \(\gamma\)-lactone \\
37 & Biphenyl & 87 & Octadecanoic acid methyl ester \\
38 & \(n\)-Tetradecane & 88 & Dodecylphenol \\
39 & Dodecanal & 89 & Octadecanoic acid \\
40 & Octanediolic acid dimethyl & 90 & \(n\)-Pentadecylbenzene \\
41 & \(n\)-Octylbenzene & 91 & \(n\)-Hexadecylbenzene \\
42 & \(n\)-Pentadecene & 92 & 2-Heneicosanone \\
43 & \(n\)-Pentadecane & 93 & Hydroxyadecanoic acid \(\gamma\)-lactone \\
44 & Dodecanoic acid methyl ester & 94 & Eicosanoic acid methyl ester \\
45 & \(n\)-Nonylbenzene & 95 & \(n\)-Heptadecylemene \\
46 & \(n\)-Hexadecene & 96 & \(n\)-Octadecylbenzene \\
47 & \(n\)-Hexadecane & 97 & Hexadecanephenone \\
48 & Fluorene & 98 & Bis-(2-ethylhexyl)-phthalate \\
49 & Diethyl phthalate & 99 & Tetracosaonic acid methyl ester \\
50 & \(n\)-Decylbenzene & 100 & Octadecanephenone \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Pyrolysis products obtained in the pyrolysis at 250 and 400 \({}^{\circ}\)C (double shot) with tetramethyl ammonium hydroxide of the acid hydrolyzed _Octroonis lascauxensis_ melanin. methyl esters ranging from C\({}_{3}\) to C\({}_{24}\), and aliphatic dicarboxylic acid dimethyl esters (C\({}_{4}\) to C\({}_{9}\)), as indicated in Table 4. Fatty acid derivatives: hydroxyhexadecanoic acid \(\gamma\)-lactone (peak 86), hydroxyoctadecanoic acid \(\gamma\)-lactone (peak 93) as well as the non-methylated hexadecanoic acid and octadecanoic acids were also identified (peaks 76, 89). Remarkable is the presence of the series of 2-alkanones from which the most evident compounds were 2-pentadecanone (peak 54), 2-heptadecanone (peak 70), and alkalanals from C\({}_{10}\) to C\({}_{23}\), maximizing at pentadecanal (peak 55), and a few dialkyl phthalates (peaks 49, 77, and 98).