1-Piperazineacetamide, 4-methyl-N-2-pyridinyl-, (Z)-2-butenedioate (1:2) 124068-65-1 4-Methyl-N-2-pyridinyl-1-piperazineacetamide (Z)-2-butenedioate (1:2) N-(2-Pyridyl)-2-(4-methyl-1-piperazinyl)acetamide bis(hydrogen maleate) VUFB-17103