Conversions of deoxyradicinin to radicinin and of radicinin to 3-epi-radicinin in the phytopathogenic fungus Bipolaris coicis

► Formation of radicinin from deoxyradicinin by the fungus was verified experimentally. ► Formation of 3-epi-radicinin from radicinin was unexpected. ► Radicinin epimerase is a unique enzyme involved in fungal secondary metabolism.