Showing structure for (1s)-21-methyl-14-oxo-3,13,21-triazapentacyclo[11.8.0.0²,¹⁰.0⁴,⁹.0¹⁵,²⁰]henicosa-2(10),4,6,8,15,17,19-heptaene-12-carboxylic acid