Showing structure for 6-{15-ethyl-1,11-diazapentacyclo[9.6.2.0²,⁷.0⁸,¹⁸.0¹⁵,¹⁹]nonadeca-2,4,6,8(18)-tetraen-17-yl}-2,12-diazahexacyclo[14.2.2.1⁹,¹².0¹,⁹.0³,⁸.0¹⁶,²¹]henicosa-3,5,7-triene-18-carboxylic acid