Monooxygenase involved in the biosynthesis of labdane-related diterpenes natural products (PubMed:26976595). Catalyzes the oxidation of abietatriene to produce ferruginol (PubMed:26976595). Ferruginol is an intermediate in the biosynthesis of carnosate, a potent antioxidant (PubMed:26976595). May also convert miltiradiene into 11-oxomiltiradiene (PubMed:26976595). abieta-8,11,13-triene + O2 + reduced [NADPH--hemoprotein reductase] = ferruginol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] ferruginol + O2 + reduced [NADPH--hemoprotein reductase] = 11-hydroxyferruginol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] miltiradiene + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = 11-oxomiltiradiene + 2 H(+) + 3 H2O + 2 oxidized [NADPH--hemoprotein reductase] Secondary metabolite biosynthesis; terpenoid biosynthesis. Expressed in leaf glandular trichomes. Belongs to the cytochrome P450 family.