Showing structure for methyl (1s,10s,12s,13z,18s)-13-ethylidene-18-formyl-8,15-diazapentacyclo[10.5.1.0¹,⁹.0²,⁷.0¹⁰,¹⁵]octadeca-2,4,6,8-tetraene-18-carboxylate