ID 1.14.14.66 DE marmesin synthase. CA demethylsuberosin + O2 + reduced [NADPH--hemoprotein reductase] = (7S)- CA marmesin + H(+) + H2O + oxidized [NADPH--hemoprotein reductase]. CC -!- Involved in psoralen biosynthesis, see EC 1.14.13.102. //