1-Methyl-4-((2,4,6-trimethylphenyl)methyl)piperazine (Z)-2-butenedioate (1:2) 61014-77-5 Piperazine, 1-methyl-4-((2,4,6-trimethylphenyl)methyl)-, (Z)-2-butenedioate (1:2)