2,11,12-Trihydroxy-7,20-epoxy-8,11,13-abietatriene
2,11,12-Trihydroxy-7,20-epoxy-8,11,13-abietatriene, a diterpenoid, has significant effects on DPPH radical scavenging activity with an IC50 value of 20.0 uM. 2,11,12-Trihydroxy-7,20-epoxy-8,11,13-abietatriene shows potent antioxidant activity[1].