Showing structure for 28,35-diethyl-26-methylidene-8,18,24,30-tetraazaundecacyclo[25.5.2.2¹⁸,²¹.1²,⁶.0¹,²⁵.0⁷,¹⁵.0⁷,²².0⁹,¹⁴.0¹⁵,¹⁹.0³⁰,³³.0²⁴,³⁷]heptatriaconta-2,4,6(37),9,11,13-hexaene