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-2(11),5(10),6,8,12,14(19),15,17,20-nonaen-3-one