Showing structure for (1r,10s,12r,13e,15s,16s,17s,18r)-18-(acetyloxy)-13-ethylidene-8,15-diazahexacyclo[14.2.1.0¹,⁹.0²,⁷.0¹⁰,¹⁵.0¹²,¹⁷]nonadeca-2,4,6,8-tetraen-15-ium-15-olate