Compound 2

[Potassium 1,4,7,10,13,16-hexaoxacyclooctadecane bis-tetrahydrofuran] {μ-η²:η²-dimidium nitride di[dysprosium bis-trimethylsilylamide tetrahydrofuran]}

From: Strong exchange and magnetic blocking in N₂³⁻-radical-bridged lanthanide complexes