1-(2-Methoxycarbonylethyl)-4-(1-naphthyl)piperazine maleate 1-Piperazinepropanoic acid, 4-(1-naphthalenyl)-, methyl ester, (Z)-2-butenedioate (1:1) 4-(1-Naphthalenyl)-1-piperazinepropanoic acid methyl ester maleate 57536-99-9