Showing structure for 2,18-dimethyl 17,18-dihydroxy-4-methoxy-13-oxo-2,12-diazahexacyclo[14.2.2.1⁹,¹².0¹,⁹.0³,⁸.0¹⁶,²¹]henicosa-3,5,7,14-tetraene-2,18-dicarboxylate