Catalyzes the hydroxylation of ent-sandaracopimaradiene at the C3alpha position to produce ent-3beta-hydroxy-sandaracopimaradiene, an intermediates for the biosynthesis of oryzalexin D and oryzalexin E phytoalexins (PubMed:22247270, PubMed:23795884). Catalyzes the hydroxylation of ent-cassadiene at the C3alpha position to produce 3alpha-hydroxy-ent-cassadiene, which may be an intermediate for the biosynthesis of phytocassane phytoalexins (PubMed:22247270). Catalyzes the hydroxylation of syn-pimaradiene (9-beta-pimara-7,15-diene) at the C3beta position to produce 3-beta-syn-pimaradiene (PubMed:25758958). Can hydroxylate ent-kaurene in vitro, but the product is not ent-kauren-19-ol as expected for ent-kaurene oxidase activity (PubMed:22247270). ent-sandaracopimara-8(14),15-diene + O2 + reduced [NADPH--hemoprotein reductase] = ent-sandaracopimaradien-3beta-ol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 9beta-pimara-7,15-diene + O2 + reduced [NADPH--hemoprotein reductase] = 9beta-pimara-7,15-diene-3beta-ol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] kcat is 1.4 sec(-1) with syn-pimaradiene as substrate. Interacts with the rice dwarf virus (RDV) P2 protein. Expressed in leaf blades and sheaths, stems and panicles. By N-acetylchitooligosaccharide elicitor (PubMed:15316288) and methyl jasmonate (PubMed:22247270). Belongs to the cytochrome P450 family.