Showing structure for 2,18-dimethyl (1s,9r,15r,16s,17s,18r,21r)-15,17,18-trihydroxy-6-methoxy-2,12-diazahexacyclo[14.2.2.1⁹,¹².0¹,⁹.0³,⁸.0¹⁶,²¹]henicosa-3,5,7-triene-2,18-dicarboxylate