6-(L-1,2,3-Trihydroxybutyl)-pterin

6-(L-1,2,3-Trihydroxybutyl)-pterin is a derivative of L-biopterin (HY-102015) and is the oxidized form of tetrahydro-L-biopterin (BH4) as well as D-biopterin. Co-ingestion of 6-(L-1,2,3-Trihydroxybutyl)-pterin (0.5%) with the carcinogen 4-dimethylaminoazobenzene reduces the incidence of 4-dimethylaminoazobenzene-induced liver tumors in rats. 6-(L-1,2,3-Trihydroxybutyl)-pterin has been used as an internal standard for the LC-MS quantification of biopterin and neopterin in rat plasma.