Showing structure for 18-hydroxy-8-imino-3,10,20-triazapentacyclo[11.7.1.0²,⁷.0⁹,²¹.0¹⁴,¹⁹]henicosa-1(20),2(7),9,11,13(21),14(19),15,17-octaen-6-one