Table 1 | Accurate mass measurements of molecular ..

Peak no.	Compound	Elemental composition	Experimental mass (m/z)	Theoretical mass (m/z)	Error
Peak no.	Compound	Elemental composition	Experimental mass (m/z)	Theoretical mass (m/z)	mDa	ppm
1	MQCA	C₁₀H₉N₂O₂	189.0668	189.0664	0.9	1.0
2	QCT	C₁₈H₁₅N₂O₃	307.1068	307.1083	-0.4	-1.3
3	4-DQCT	C₁₈H₁₅N₂O₂	291.1137	291.1134	0.6	1.2
4	1-DQCT	C₁₈H₁₅N₂O₂	291.1130	291.1134	-1.3	-2.6
5	DQCT	C₁₈H₁₅N₂O	275.1167	275.1184	-1.2	-4.4

Table 1: Accurate mass measurements of molecular ions of target compounds in a standard solution in PI mode.

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