Optimization of Eugenia punicifolia (Kunth) D. C. leaf extraction using a simplex centroid design focused on extracting phenolics with antioxidant and antiproliferative activities

Table 3 Phenolic identified by ESI(−)-MS found in ethanolic Eugenia punicifolia extracts

Formula [M−H]⁻	Theoretical mass [M−H] m/z	Experimental mass [M−H]⁻ m/z	Δm (ppm)	MS/MS fragments m/z	Compound identification
C₁₄H₅O₈	300.9990	300.9990	− 0.03	283, 271, 245, 201, 145, 123	Ellagic acid
C₁₃H₁₅O₁₀	331.0671	331.0666	1.42	271, 211, 169	Monogalloylglucose
C₂₀H₁₇O₁₁	433.0776	433.0767	2.15	300, 271, 151,	Quercetin-3-O-β-d-xylopyranoside
C₂₁H₁₉O₁₁	447.0933	447.0940	− 1.60	316, 300, 271, 255, 169	Quercetin-3-O-β-rhamnoside
C₁₈H₂₃O₁₄	463.0891	463.0882	− 1.92	316, 271, 169, 125	Myricitrin
C₂₀H₁₇O₁₄	481.0624	481.0642	2.86	301, 275, 169, 151	HHDP glucose isomer
C₂₀H₁₉O₁₄	483.0780	483.0756	5.02	331, 169, 125	Digalloyl-glucose isomer
C₃₉H₁₈O₈	615.1085	615.1061	3.96	463, 300, 169	Quercertin galloylhexoside isomer
C₃₄H₂₃O₂₂	783.0686	783.0678	1.08	617, 300, 275	Bis HHDP-glucose isomer

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