Showing structure for 9-cyano-3,13-dihydroxy-6-methyl-11,18-dioxo-5-oxa-9-azapentacyclo[8.8.0.0²,⁸.0⁴,⁶.0¹²,¹⁷]octadeca-1(10),2(8),12,14,16-pentaen-7-yl 2-methylpropanoate