tert-butyl N-[N'-[4-[[26,27-bis[4-[bis[(2-methylpropan-2-yl)oxycarbonylamino]methylideneamino]butoxy]-5,11,17,23-tetratert-butyl-28-[4-[(2-methylpropan-2-yl)oxycarbonylamino]butoxy]-25-pentacyclo[19.3.1.13,7.19,13.115,19]octacosa-1(25),3,5,7(28),9(27),10,12,15(26),16,18,21,23-dodecaenyl]oxy]butyl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamimidoyl]carbamate