In planta high levels of hydrolysable tannins inhibit peroxidase mediated anthocyanin degradation and maintain abaxially red leaves of Excoecaria Cochinchinensis

Table 1 The main anthocyanins detected in the leaves using UPLC-DAD-QTOF-MS/MS

Species	Compound No.^a	Rt (min)	m/z		Molecular Formula^b	Putative Compounds^b
Species	Compound No.^a	Rt (min)	[M+H]⁺	Fragment Ions	Molecular Formula^b	Putative Compounds^b
Excoecaria	1	0.364	449.1080	176.9858, 190.9661, 287.0551	C₂₁ H₂₁ O₁₁⁺	Cyanidin 3-O-glucoside
	2	1.392	617.1148	153.0183, 303.0500	C₂₈ H₂₅ O₁₆⁺	Delphinidin 3-(2″-galloylgalactoside)
	3	1.724	601.1224	153.0181, 287.0552	C₂₈ H₂₅ O₁₅⁺	Cyanidin 3-(2″-galloylglucoside)
	4	3.034	595.1666	287.0535	C₂₇ H₃₁ O₁₅⁺	Cyanidin 3-O-rutinoside
	5	3.466	641.1705	145.0499, 317.0652, 443.7365, 479.1180	C₂₈ H₃₃ O₁₇⁺	Petunidin 3-sophoroside
	6	3.698	625.1761	301.0658, 464.1260	C₂₈ H₃₃ O₁₆⁺	Peonidin 3-gentiobioside
Osmanthus	7	2.399	595.1691	287.0550, 449.1083	C₂₇ H₃₁ O₁₅⁺	Cyanidin 3-O-rutinoside
	8	3.577	611.1626	303.0488	C₂₇ H₃₁ O₁₆⁺	Delphinidin 3-neohesperidoside
	9	3.626	889.2407	287.0550, 581.1500	C₄₁ H₄₅ O₂₂⁺	Cyanidin 3-[6-(6-ρ-coumarylglucosyl)- 2-xylosylgalactoside
	10	3.676	579.1687	399.1070, 401.1230, 417.1175	C₂₇ H₃₁ O₁₄⁺	Pelargonidin 3-rhamnoside-5-glucoside
	11	4.207	449.1078	121.0653, 137.0589, 287.0553	C₂₁ H₂₁ O₁₁⁺	Cyanidin 5-O-glucoside

^a The compound numbers represent the main anthocyanin peaks as indicated in Fig. 2C and D
^b The molecular formula and the compounds were deduced based on searching the m/z and MS/MS spectra of positive modes in “METLIN” database
Rt—Retention time
[M+H]⁺—Molecular ion

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