Showing structure for (1s,6r,13s)-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-hexaene-13,17-diol