Comprehensive investigation on flavonoids metabolites of Longjing tea in different cultivars, geographical origins, and storage time.

3.4.2 Methylated or methoxylated The proportion of methylation or methoxylation in significant differential flavonoid metabolites was in the middle level, whereas, their differences were extremely significant, such as epigallocatechin3- O -(3- O -methyl)gallate, epicatechin-3-(3′′- O -methyl)gallate, methylhesperidin, 6-C-methylquercetin-3- O -rutinoside, and syringetin in the cultivar comparison ( Fig.

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