Showing structure for 13-methyl-5,7,17,19,25-pentaoxa-13-azaheptacyclo[12.10.1.0¹,¹².0²,¹⁰.0⁴,⁸.0¹⁵,²³.0¹⁶,²⁰]pentacosa-2,4(8),9,15,20,22-hexaene