A solution of 2,6-diformyl-4-methylphenol (0.15mmol) and benzoylhydrazide (0.30 mmol) in MeOH (10 ml) was allowed to react with the dysprosium(III) perchlorate hexahydrate (0.3 mmol) in 10 ml MeOH In observation of slow magnetic relaxation in triple-stranded lanthanide helicates.