1-Piperazineacetamide, 4-methyl-N-(2-nitrophenyl)-N-phenyl-, (Z)-2-butenedioate (1:2), 1/2H2O 118989-82-5 Acetamide, 2-(4-methyl-1-piperazinyl)-N-(2-nitrophenyl)-N-phenyl-, (Z)-2-butenedioate, hydrate (2:4:1) N-(2-Nitrophenyl)-N-phenyl-2-(4-methyl-1-piperazinyl)acetamide dimaleate hemihydrate