Polar Constituents from Sageretia Thea Leaf Characterized by HPLC‐SPE‐NMR Assisted Approaches

Nine glycosides ( 1–9 ) were characterized from the n ‐butanol‐soluble fraction of the ethanolic extract of the leaves of Sageretia thea by the general approach. Among these, Compounds 6 and 7 were identified as a mixture. Application of HPLC‐SPE‐NMR in two selected fractions led to the separation of this mixture and the characterization of three additional minors ( 10–12 ). Among these, 7‐ O ‐methylmyricetin 3‐ O ‐α‐ l ‐arabinofuranoside ( 8 ) is a new natural product and eight compounds, i.e. glucofragulin A ( 1 ), quercetin‐3‐ O ‐α‐ l ‐arabinopyranoside ( 5 ), 3‐ O ‐β‐ d ‐galactopyranoside ( 6 ), 3‐ O ‐β‐ d ‐glucopyranoside ( 7 ), and 3‐ O ‐α‐ l ‐arabinofuranoside ( 11 ), myricetin‐3‐ O ‐α‐ l ‐arabinofuranoside ( 9 ) and 3‐ O ‐β‐ d ‐glucopyranoside ( 10 ), and quercetrin ( 12 ), are found for the first time from the title plant.