Showing structure for (4s,8r)-17-chloro-2,18-dimethoxy-7,9,13-trioxapentacyclo[10.8.0.0³,¹⁰.0⁴,⁸.0¹⁴,¹⁹]icosa-1,3(10),5,11,14,16,18-heptaen-20-one