Showing structure for 18-[(acetyloxy)methyl]-13-ethylidene-18-(methoxycarbonyl)-8,15-diazapentacyclo[10.5.1.0¹,⁹.0²,⁷.0¹⁰,¹⁵]octadeca-2,4,6,8-tetraen-15-ium-15-olate