Showing structure for (1r,2r,5r,8r,9r,10s,11r,13r,14r,15r,17s,18s)-8-(carboxymethyl)-11,17-dihydroxy-1,2,6,6,9-pentamethyl-15-(prop-1-en-2-yl)-7-oxapentacyclo[11.7.0.0²,¹⁰.0⁵,⁹.0¹⁴,¹⁸]icosane-18-carboxylic acid