2.1. Profiling of Phytochemical Composition and In Vitro Antioxidant of Extracts
In this study, we choose two extracts for comparison: IC-E is the crude extract of IC and IC-P is obtained by purification with macro-porous adsorption resin. In general, more than 800 metabolites were detected in IC extract, involving 66 components. There were 12 compounds with relative content of more than 1% in the two extracts, of which amino acid and derivatives, flavonoids, and carboxylic acids and derivatives were the main components (According to the analysis results of the extract components and the related research on chrysanthemum flavonoids reported earlier [The free radical scavenging and antioxidant activities of various IC extract have been estimated using DPPH, ABTS and HR assays (