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. 2020 Jan 12;9(1):69. doi: 10.3390/antiox9010069

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Representative UHPLC-UV chromatograms of the methanol-water (7;3, v/v) extracts from the leaves of C. bullatus (a) and C. zabelii (b) at 280 nm. Potential active markers are marked in blue. NCHA, neochlorogenic acid (3--O-caffeoylquinic acid); CHA, chlorogenic acid (5--O-caffeoylquinic acid); CCHA, cryptochlorogenic acid (4--O-caffeoylquinic acid); CAD, caffeic acid derivative; ECA, (–)-epicatechin; PB2, procyanidin B2; PC1 procyanidin C1; QPH, quercetin pentoside-hexoside; RT, rutin; HP, hyperoside; IQ, isoquercitrin; QR, quercitrin. Other identified constituents are labeled with the appropriate symbol depending on the phytochemical group they belong to: •, B-type procyanidins; *, caffeic and p-coumaric acids derivatives; #, quercetin glycosides. For details of compounds′ identification, see Supplementary Materials, Figure S1 and Table S1.