The present invention provides a composition for analyzing Cytochrome P450 isoenzymatic activity by using a substrate-containing gas chromatography that specifically reacts with cytochrome P450 isoenzymes, thereby providing a composition for assaying activity of various cytochrome P450 isoenzymes through gas chromatography mass spectrometry Can be measured simultaneously. Accordingly, the present invention can provide a system capable of efficiently measuring the interaction of a drug in a multi-component-containing composite such as a herbal medicine bath.;
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