Showing structure for (1r,4z,7s,17r)-4-ethylidene-7-hydroxy-7-(hydroxymethyl)-6-methylidene-3,8-dioxo-2,9-dioxa-14-azatricyclo[9.5.1.0¹⁴,¹⁷]heptadec-11-en-14-ium-14-olate