ent-cassa-12,15-dien-2beta-ol + reduced [NADPH--hemoprotein reductase] + O2 => ent-cassa-12,15-dien-2beta,3beta-ol + oxidized [NADPH--hemoprotein reductase] + H2O + H(+)
ent-cassa-12,15-dien-2beta-ol + reduced [nadph--hemoprotein reductase] + o2 => ent-cassa-12,15-dien-2beta,3beta-ol + oxidized [nadph--hemoprotein reductase] + h2o + h(+)