Showing structure for (1r,4e,6r,7r,17s)-7,17-dihydroxy-4-(2-hydroxyethylidene)-6,7,14-trimethyl-3,8-dioxo-2,9-dioxa-14-azatricyclo[9.5.1.0¹⁴,¹⁷]heptadec-11-en-14-ium