Showing structure for (9r,11r,12r,13r)-9,13-dihydroxy-11-methyl-3,5-dioxa-11-azapentacyclo[10.7.1.0²,⁶.0⁸,²⁰.0¹⁴,¹⁹]icosa-1(20),2(6),7,14,16,18-hexaen-11-ium-11-olate