Table 2. Comparison of the Adulterations Markers Detected in Negative Ionization Mode.

	Laboratory #1							Laboratory #2
compound ID	formula	m/z [M – H]−	Δmass (ppm)	RT [min]	p-value DEA	p-value DEO	p-value DEO_DEA	formula	m/z [M – H]−	Δmass (ppm)	RT [min]	p-value DEA	p-value DEO	p-value DEO_DEA
7	C23H29ClO4	403.1682	1.5	5.67	2.03 × 10–10	1.00 × 10–15	1.17 × 10–8	C23H29ClO4	403.1663	3.2	3.74	5.19 × 10–37	1.52 × 10–37	1.22 × 10–20
8	C23H27ClO4	401.1534	3.7	5.60	1.00 × 10–15	1.00 × 10–15	1.09 × 10–5	C23H27ClO4	401.151	2.2	3.67	7.33 × 10–56	7.16 × 10–43	n.a.
9	C25H33ClO6	463.1903	3.5	5.35	9.10 × 10–10	1.00 × 10–15	1.07 × 10–7	C25H33ClO6	463.182	14.5	3.49	2.70 × 10–24	2.26 × 10–22	1.04 × 10–19
10	C25H31ClO6	461.1748	3.9	5.41	1.00 × 10–15	1.00 × 10–15	1.00 × 10–15	C25H31ClO6	461.1723	1.5	3.53	4.33 × 10–21	2.67 × 10–13	6.85 × 10–24
11	C23H33ClO5	423.1955	4.0	5.40	1.00 × 10–15	1.00 × 10–15	1.00 × 10–15	C23H33ClO5	423.1927	2.6	3.52	2.06 × 10–42	2.75 × 10–50	2.69 × 10–24
12	C23H32O4	371.2231	2.4	5.50	1.29 × 10–5	3.34 × 10–9	8.05 × 10–6	C23H32O4	371.222	0.5	3.58	3.59 × 10–26	4.23 × 10–28	1.21 × 10–15