eupatolide synthase activity
Catalysis of the reaction: 8beta-hydroxygermacra-1(10),4,11(13)-trien-12-oate + O2 + reduced [NADPH--hemoprotein reductase] = eupatolide + 2 H2O + oxidized [NADPH--hemoprotein reductase].
GO:0004497
monooxygenase activity
is_a