Table 2.

Metabolites with 137.07 ± 0.05 m/z in a positive-mode mass detection

HMDB ID	Common Name	Chemical Formula	Adduct MW (Da) [Matching HMDB MW]	MW Difference (Da) [QueryMass - AdductMass]	Adduct
HMDB03152	N-Methylnicotinamide	C7H8N2O	137.070938 [136.063660]	0.004333	M+H [1+]
HMDB00209	Benzeneacetic acid	C8H8O2	137.059708 [136.052429]	0.006897	M+H [1+]
HMDB01326	Phenyl acetate	C8H8O2	137.059708 [136.052429]	0.006897	M+H [1+]
HMDB11659	2-Methylerythritol	C5H12O4	137.080841 [136.073563]	0.014236	M+H [1+]
HMDB01216	Tetrahydropteridine	C6H8N4	137.082184 [136.074905]	0.015579	M+H [1+]
HMDB00157	Hypoxanthine	C5H4N4O	137.045792 [136.038513]	0.020813	M+H [1+]
HMDB00613	Erythronic acid	C4H8O5	137.044449 [136.037170]	0.022156	M+H [1+]
HMDB00943	Threonic acid	C4H8O5	137.044449 [136.037170]	0.022156	M+H [1+]

M+H[1+] adducts only are listed.