Table 2: Peak identification of the gas chromatogram (corresponding to Exp. 4, Table 1) shown in Fig. 2.
Peak label Integ. area Separation time Molecular ion mass Assigned carrier

(relat. to HMT) s amu

1 100 1020 140 HMT

2 0.07 1078 154 HMT-CH₃

3 0.25 1286 156 HMT-OH

4 0.03 1485 170 HMT-CH₂OH

5 0.04 1690 183 HMT-NH-CHO

Exp. 1 0.04 3729 198 CH₂OH-HMT-CHO/HMT-CHOH-CHO

**Table 2:** Peak identification of the gas chromatogram (corresponding to Exp. 4, Table 1) shown in Fig. 2.
Peak label	Integ. area	Separation time	Molecular ion mass	Assigned carrier
	(relat. to HMT)	s	amu
1	100	1020	140	HMT
2	0.07	1078	154	HMT-CH₃
3	0.25	1286	156	HMT-OH
4	0.03	1485	170	HMT-CH₂OH
5	0.04	1690	183	HMT-NH-CHO
Exp. 1	0.04	3729	198	CH₂OH-HMT-CHO/HMT-CHOH-CHO

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