1-(4-Cyclopentylphenyl)-2-(4-methylpiperazino)ethanol bis(hydrogen maleate) 1-Piperazineethanol, alpha-(4-cyclopentylphenyl)-4-methyl-, (Z)-2-butenedioate (1:2) 85689-80-1 alpha-(4-Cyclopentylphenyl)-4-methyl-1-piperazineethanol (Z)-2-butenedioate (1:2)