B 2401 (OTTO) Butyldiethanolamine, 98% Cas Butyldiethanolamine, 98% - used in the synthesis of the following complexes (Hdnba = 3,5-dinitrobenzoic acid, Hpta = p-toluic acid, H2tpa = terephthalic acid) tetranuclear 3d-4f single-molecule magnet (SMM) complexes.