worenine/coptis chinensis

OBJECTIVE To study the chemical constituents of Coptis chinensis. METHODS The compounds were separated and purified by column chromatography and their structures were identified by spectroscopic methods. RESULTS Seven compounds were isolated from the chloroform extract of Coptis chinensis, whose

A ultra-high performance liquid chromatography-electrospray ionization tandem mass spectrometry (UHPLC-ESI-MS/MS) method was successfully developed and validated for the identification and determination of eight alkaloids: tetrahydropalmatine (A); palmatine (B); magnoflorine (C); columbamine (D);