1,3,5-Triazine-2,4-diamine, 6-(4-(2-benzofuranylmethyl)-1-piperazinyl)-N,N'-di-2-butenyl-, (E)-2-butenedioate (1:2) 1-(4,6-Bis-crotylamino-s-triazin-2-yl)-4-(benzofuran-2-ylmethyl)piperazine difumarate 87813-80-7