Showing structure for 12-(3,4-dihydroxyphenyl)-7,8,16,17-tetrahydroxy-4-oxa-1-azapentacyclo[11.8.0.0²,¹¹.0⁵,¹⁰.0¹⁴,¹⁹]henicosa-5,7,9,12,14,16,18,20-octaen-3-one