Showing structure for 4,5-dimethyl (1r,4r,12s,13r,21r)-7-methoxy-20-oxo-5,15-diazahexacyclo[11.5.2.1¹,¹².0⁴,¹².0⁶,¹¹.0¹⁵,²¹]henicosa-6,8,10-triene-4,5-dicarboxylate