Showing structure for 9-ethyl-4,18-dihydroxy-12-(1-hydroxyethyl)-3,15-dimethyl-13-oxa-19-azatetracyclo[18.3.1.0⁵,²³.0¹⁵,²¹]tetracosa-1(23),2,4,10,16,18,20-heptaene-6,14,22,24-tetrone