2(1H)-Phthalazinecarboxylic acid, 4-[(methoxycarbonyl)oxy]-1-oxo-, methyl ester, compd. with carbamic acid, 1,2-phenylenebis-, dimethyl ester, and 1,2-hydrazinedicarboxylic acid, dimethyl ester (1:1:1) AIDS-156373 AIDS156373 NSC609355