Showing structure for (1r,13r)-17-methoxy-6-(prop-1-en-2-yl)-7,11,20-trioxapentacyclo[11.7.0.0²,¹⁰.0⁴,⁸.0¹⁴,¹⁹]icosa-2(10),3,8,14,16,18-hexaen-18-ol