4-Methyl 2-(dibenzo(b,e) 1,4-dioxepin-11-yl)ethyl 1-piperazine difumarate [French] 81320-31-2 Piperazine, 1-(2-(11H-dibenzo(b,e)(1,4)dioxepin-11-yl)ethyl)-4-methyl-, (+-)-, (E)-2-butenedioate (1:2)