Showing structure for 16-hydroxy-18-(3-hydroxyprop-1-en-2-yl)-1,2,17-trimethyl-14-oxo-8-(prop-1-en-2-yl)-13-oxapentacyclo[10.8.1.0²,¹⁰.0⁵,⁹.0¹⁷,²¹]henicosane-5-carboxylic acid