Showing structure for methyl 5,7-dioxa-2,15-diazaheptacyclo[17.2.2.1¹²,¹⁵.0¹,¹².0³,¹¹.0⁴,⁸.0¹⁹,²⁴]tetracosa-3,8,10,17,20-pentaene-21-carboxylate