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Table 1

Four main molecules detected in the TPD measurements with their structure, masses, QMS fragments, and desorption temperature.

Molecule Structure Parent mass (amu) Main QMS fragments (amu) Desorption temperature (K)
Toluene CH3C6H5 92 91, 65, 63, 51 200
Methyl-cyclohexene CH3C6H9 96 81, 68, 67, 55 196
Methyl-cyclohexane CH3C6H11 98 83, 70, 69, 56, 55 190
Cyclohexane C6H12 84 69, 56, 55 174

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