Abstract
The N-feruloylserotonin containing fraction was isolated from seeds of Leuzea carthamoides (Willd.) DC by solvent extraction followed by column chromatography on silica gel or on Sephadex LH-20. Nuclear magnetic resonance spectroscopic analysis of the isolated fraction showed the presence of four structurally related compounds. These compounds were identified as four isomers of N-feruloylserotonin: N-( Z)-feruloylserotonin, N-( Z)-isoferuloylserotonin, N-( E)-feruloylserotonin and N-( E)-isoferuloylserotonin. They were analyzed by HPLC on Separon SGX C 18, Separon SGX and Separon SGX phenyl, using various mobile phases. Separon SGX phenyl phase was found the most efficient for a rapid analysis and for the final separation of the N-feruloylserotonin isomers.
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