Showing structure for methyl (1r,9s,11s,15r,17r,19r)-14-ethylidene-19-formyl-18-oxa-2,12-diazahexacyclo[9.6.1.1⁹,¹⁵.0¹,⁹.0³,⁸.0¹²,¹⁷]nonadeca-3,5,7-triene-19-carboxylate