Showing structure for (15r,16s,17r,18r,20s)-2,15,16,17-tetrahydroxy-6,18-dimethyl-8-propyl-19,21-dioxa-7-azapentacyclo[12.7.0.0³,¹¹.0⁴,⁹.0¹⁵,²⁰]henicosa-1(14),2,4(9),5,7,11-hexaene-10,13-dione