| abstract |
ABSTRACT HYDRAZINE DERIVATIVES A hydrazine derivative of the formula : (I) wherein A represents an optionally substituted phenyl, naphthyl or heteroaromatic group containing one or two nitrogen atoms, and R1 represents hydrogen, optionally substituted alkyl, or optionally substituted benzyl, phenethyl, or 1-naphthylmethyl, 2-naphthylmethyl, or pyrid-3 ylmethyl group, and salts thereof, possess useful pharmaceutical properties. |