Monooxygenase that oxidizes 11-hydroxysugiol to produce 11,20-dihydroxysugiol (PubMed:26682704). Can oxidize 11-hydroxyferruginol to produce 11,20-dihydroxyferruginol (PubMed:26682704). These products are intermediates in tanshinone biosynthesis (PubMed:26682704). 11-hydroxysugiol + O2 + reduced [NADPH--hemoprotein reductase] = 11,20-dihydroxysugiol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 11-hydroxyferruginol + O2 + reduced [NADPH--hemoprotein reductase] = 11,20-dihydroxyferruginol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Secondary metabolite biosynthesis; terpenoid biosynthesis. Highly expressed in roots. Belongs to the cytochrome P450 family.