## 3 Results
### Thermal Desorption-Gas Chromatography-Mass Spectrometry of the Melanin from Ochroconis lascauxensis
Aromatic compounds were represented by the series of alkylbenzenes (C\({}_{1}\)-C\({}_{18}\)) (e.g., peaks 4, 10, 75, 113, 117), naphthalene and methylnaphthalene (peaks 40, 52), phenanthrene (peak 86), while phenolic compounds were represented by phenol (peak 15), methylphenol (peak 28), methoxyphenol (peak 30), ethylphenol (peak 37), etc. In addition, other trace compounds, not included in Table 3, such as trimethylphenol, methylmethoxyphenol, methylbenzaldehyde, and ethylbenzenediol, were identified. Other oxygen-containing compounds were acetophenone (peak 26), benzoic acid (peak 41), or phenylfuran (peak 43) (Table 3). Aliphatic series of compounds, such as alkanes and alkenes (C\({}_{8}\)-C\({}_{23}\)) with maximum at C\({}_{14}\) (peak 58) were identified with relative abundance. Ergosterol derivatives (peaks 121, 122) were still present as minor compounds. Figure 3B shows the chromatogram of the acid hydrolyzed melanin pyrolyzed at 500 \({}^{\circ}\)C, after a thermal desorption at 300 \({}^{\circ}\)C. The pyrolyzate of this sample was characterized by the intensity of a few products such as benzene (1), pyridine (2), toluene (4), ethylbenzene (7), styrene (10), phenol (15), trimethylbenzene (16), benzonitrile (17), biphenyl (57), hexadecanitrile (92), hexadecanoic acid (99), octadecanitrile (107), and octadecanoic acid (109). \begin{table}
\begin{tabular}{c c c c} \hline
**Peak** & **Compound** & **Peak** & **Compound** \\ \hline
20 & Indane & 81 & Diketodipyrrole \\
21 & Indene & 82 & Tetradecanoic acid \\
22 & \(n\)-Butylbenzene & 83 & \(n\)-Undecylbenzene \\
23 & \(n\)-Butylthiophene & 84 & \(n\)-Octadecene \\
24 & Methylphenol & 85 & \(n\)-Octadecene \\
25 & Methylpropylbenzene & 86 & Phenanthrhene \\
26 & Acetophenone & 87 & Phenylbenzofuran \\
27 & \(n\)-Undecene & 88 & Pentadecanoic acid \\
28 & Methylphenol & 89 & \(n\)-Dodecylbenzene \\
29 & \(n\)-Undecane & 90 & \(n\)-Nonadecene \\
30 & Methoxyphenol & 91 & \(n\)-Nonadecene \\
31 & Benzaceaeonitrile & 92 & Hexadecanitrile \\
32 & Methylbenzofuran & 93 & Tetradecylfuran \\
33 & Methylpropenylbenzene & 94 & Hexadecanoic acid methyl ester \\
34 & Methylbenzonitrile & 95 & Methylphenanthrene \\
35 & \(n\)-Pentylbenzene & 96 & Methylphenanthrene \\  & & & Hexahydro-(methylpropyl)- \\
36 & \(n\)-Pentylthiophene & 97 & pyrtropyzareindone \\
37 & Ethylphenol & 98 & Diethoxy-tetrahydro-dipropylrazine \\
38 & \(n\)-Dodecene & 99 & Hexadecanoic acid \\
39 & \(n\)-Dodecane & 100 & \(n\)-Eicosene \\
40 & Naphthalene & 101 & \(n\)-Eicosane \\
41 & Benzoic acid & 102 & Phenylnaphthalene \\
42 & Vinylphenol & 103 & Octadecaniotic acid \\
43 & Phenylfuran & 104 & Dimethylphenanthrene \\
44 & Benzenepropaneniitrile & 105 & Octadecenitrile \\
45 & \(n\)-Hexylbenzene & 106 & \(n\)-Tetradecylbenzene \\
46 & \(n\)-Hexylthiophene & 107 & Octadecanentirile \\
47 & Methylpentylbenzene & 108 & Octadecenoic acid \\
48 & \(n\)-Tridecene & 109 & Octadecanoic acid \\
49 & \(n\)-Tridecane & 110 & Hexadecanamide \\
50 & Methylnaphthalene & 111 & \(n\)-Tricosene \\
51 & Indole & 112 & \(n\)-Tricosane \\
52 & Methylnaphthalene & 113 & \(n\)-Hexadecylbenzene \\
53 & \(n\)-Hepylbenzene & 114 & Hydroxyoctadecanoic acid \(\gamma\)-lactone \\
54 & Methylhexylbenzene & 115 & Octadecanamide \\
55 & \(n\)-Tetradecene & 116 & Octadecanamide \\
56 & Methylindole & 117 & \(n\)-Heptadecylbenzene \\
57 & Biphenyl & 118 & \(n\)-Octadecylbenzene \\
58 & \(n\)-Tetradecane & 119 & Tricosanenitrile \\
59 & Methyl biphenyl & 120 & Tetracosanenitrile \\
60 & Methylindole & 121 & Antihaergosta-1,5,7,9,22-pentaene \\
61 & Phenylthiophene & 122 & Antihaergosta-5,7,9,16,22-pentene \\ \hline \end{tabular}
\end{table} 
Table 3: \(Cont.\)Other relevant compounds were the series of alkyl and alkenylbenzenes from C\({}_{2}\) to C\({}_{6}\) (peaks 7, 12, 22, 35, and 45), although the series enlarged up to C\({}_{19}\), but they were minor compounds, \(n\)-undecane (peak 29), \(n\)-hexadecene (peak 76), and methylnaphthalene (peak 50).