The syntheses of five N-substituted eleostearic acid hydrazides are described: N-isopropyl- cu-eleostearoyl hydrazide, N-benzyl*-eleostearo yl hydrazide) N-phenethyl-0-eleostearo yl hydrazide, Nd-methylphenethy 1-0-eleostearoyl hydrazide, and N-0-methylphenethyla- eleostearoyl hydrazide. The compounds were in-vestigated for their ability to inhibit monoamine oxidase in vitro and to elevate the brain monoamines in mice. The results ...