N,N',N"',N""-tetra-salicylidene pentraerythrityl tetramine
DMSO was used as the reaction solvent in the synthesis of N,N',N"',N""-tetra-salicylidene pentraerythrityl tetramine. The title compound is useful as an anticorrosive additive to hydraulic fluids (U. S. Patent 3,468,802 ).

The synthesis scheme is detailed in U. S. Patent 3,994,972.
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