baicalin

Baicalin (Baicalein 7-O-β-D-glucuronide) is a prolyl endopeptidase inhibitor isolated from scutellaria baicalensis, with antioxidant, anti-tumor, anti-HIV properties.

Baicalin methyl ester shows inhibitory effects on the Avian Myeloblastosis Virus reverse transcriptase (AMV-RT).

Dihydrobaicalin, a flavonoid glycoside, is isolated from the American skullcap (Scutellaria lateriflora L.) [1].

Oroxylin A-7-O-glucuronide (Oroxylin A Glucoronide) and wogonoside should also be served as the chemical markers together with baicalin for the quality control of herbs and proprietary traditional Chinese medicine (PTCM) products of radix Scutellariae. Oroxylin A 7-O-glucuronide, Oroxin A, and Oroxin B can bind to the stem region of α-hemolysin (α-HL), when inhibiting the hemolytic activity of α-HL. Oroxylin A 7-O-glucuronide and 4', 5, 7-trihydroxy-6-methoxyflavone at a concentration of 100 microM inhibit 34 and 43% of total prolyl oligopeptidase (POP) activity, respectively.