1-Piperazinecarboxylic acid, 4-[[4-[[2-(3,4-dihydro-3-methyl-4-oxo-1-phthalazinyl)acetyl]amino]phenyl]methyl]-, 1,1-dimethylethyl ester

1-Piperazinecarboxylic acid, 4-[[4-[[2-(3,4-dihydro-3-methyl-4-oxo-1-phthalazinyl)acetyl]amino]phenyl]methyl]-, 1,1-dimethylethyl ester