| http://www.w3.org/ns/prov#value | - The method of claim 1, wherein the deprenyl compound is represented by the structure: ##STR13## in which R1 is hydrogen, alkyl, alkenyl, alkynyl, aralkyl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl, or aryloxycarbonyl;R2 is hydrogen or alkyl; R3 is a bond or methylene; and R4 is aryl or aralkyl; or R2 and R4 -R3 are joined to form, together with the methine to which they are attached, a cyclic or
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