ABSTRACT
A new isocoumarin, chamerilactone A (1) was isolated from the ethanol extract of Chamerion angustifolium with normal phase silica column chromatography, Sephadex LH-20, MCI CHP-20 and semipreparative HPLC methods. Its structure and stereochemistry were elucidated by spectroscopic methods, including 2D-NMR and optical rotation techniques.
ABSTRACT
Object To study the chemical constituents of Chamaenerion angustifolium (L ) Scop Methods The compounds were isolated on Diaion HP 20 (Tsk), Toyoperari HW 40 (C), MCI gel CHP 20P (Mitsubishi) column and their structures were identified by physiochemical properties and spectral methods Results Four flavonoids were isolated from the whole plant of C angustifolium and they were identified as quercetin 3 O ? D galactoside (Ⅰ), quercetin 3 O ? L arabinoside (Ⅱ), quercetin 3 O (6′ O galloyl) ? D galactoside (Ⅲ), quercetin (Ⅳ) respectively Conclusion Compounds Ⅰ, Ⅱ, Ⅲ were isolated from this plant for the first time