Table 1.

The main constituents of strawberry pomace extracts identified by the non-targeted UPLC-Q-TOF analysis: SLE—solid-liquid extraction; PLE—pressurized liquid extraction.

No.	RT (min)	Precursor Ion [M–H]-	Ion Formula	Negative Ions MS2 m/z (% in MS)	Structural Assignment	Extracts
						SLE- EtOH	SLE- H2O	PLE- EtOH	PLE- H2O
1	0.5	133.0131 a	C4H5O5	-	Malic acid	+	+	+	+
2	0.59	191.0186 a	C6H7O7	-	Citric acid	+	+	+	+
3	0.65	117.0182 a	C4H5O4	-	Succinic acid	+	+	+	+
4	0.72	191.0550	C7H11O6	-	Quinic acid	+	+	+	+
5	2.35	289.0716 a	C15H13O6	-	Catechin	+	-	+	+
6	2.55	325.0925 b,c	C15H17O8	145.0291 (50.3)	p-coumaric acid hexoside	+	-	+	+
7	2.95	431.0979 b,c	C21H19O10	147.0075 (4.7) 241.0498 (10.2) 269.0448 (100)	Apigenin-7-glucoside	+	-	+	-
8	3.65	163.0402 a	C9H7O3	-	p-coumaric acid	+	+	+	+
9	3.95	447.0571 b,c	C20H15O12	300.9986 (100)	Quercetin-3-rhamnoside	+	+	+	+
10	4.15	300.9987 a	C14H5O8	-	Ellagic acid	+	+	+	+
11	4.35	477.0674 a,b	C14H17O13	301.0356 (100) 151.0035 (8.4)	Quercetin-3-glucuronide	+	+	+	+
12	4.75	447.0931 b,c	C21H19O11	285.0374 (100)	Kaempferol-hexoside	+	+	+	+
13	4.85	461.07726 a,b	C21H17O12	285.0372 (100)	Kaempferol-3-glucuronide	+	+	+	+
14	5.1	137.0243 b,c	C7H5O3	-	Hydroxybenzoic acid	+	+	+	+
15	5.6	593.1297 a,b	C30H25O13	145.0303 (9.3) 285.0420 (100) 447.0932 (49.5)	Tiliroside	+	+	+	+

^a Confirmed by a standard; ^b Confirmed by comparison with the literature data; ^c Confirmed by parent ion mass using open access chemical databases (Chemspider, MetFusion).