GC-MS and NMR Analysis of ethyl-p-methoxycinnamte Isolated from Kaempferia galanga L Using Distillation Method

Abstract

The purposes of this research were to isolate and analyze ethyl-p-methoxycinnamate which is the main component of Kaempferia galanga L. Volatile oil of K. galanga L obtained by distilled fresh rhizome using simple distillation method. The main components of K. galanga L volatile oil were ethyl-p-methoxycinnamate, ethyl cinnamate, and d-3-carene. The ethyl-p-methoxycinnamate compound analyzed using gas chromatography-mass spectrometry (GC-MS) and nuclear magnetic resonance (NMR). The result of GC-MS analysis showed that ethyl-p-methoxycinnamate is the main component in the volatile oil (26,4%). The structure then confirmed using H-NMR, COSY, HMQC, and HMBC analysis in NMR.