The Ethanol Extract of Licorice (Glycyrrhiza uralensis) Protects against Triptolide-Induced Oxidative Stress through Activation of Nrf2

Figure 2

Separation of major chemical constituents of licorice ethanol extracts by HPLC-MS/MS. Peak identities and contents are (a) liquiritin (2.9%), (b) liquiritigenin (5.3%), (c) isoliquiritigenin (2.2%), and (d) glycyrrhizic acid (10.8%), based on accurate mass, retention time, and peak areas.