Cytochrome P450 monooxygenase that hydroxylates the ganoderic acids DM and TR at the C-23 position to produce hainanic acid A and ganoderic acid Jc, respectively. ganoderate DM + O2 + reduced [NADPH--hemoprotein reductase] = H(+) + H2O + hainanate A + oxidized [NADPH--hemoprotein reductase] ganoderate TR + O2 + reduced [NADPH--hemoprotein reductase] = ganoderate Jc + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Secondary metabolite biosynthesis; terpenoid biosynthesis. Belongs to the cytochrome P450 family.