Showing structure for (3r)-3-[(1s,5r,7r,10s,13r,17r,18r,21r)-7,15-dihydroxy-1,6,6,10,17,21-hexamethyl-14-oxapentacyclo[11.7.1.0²,¹¹.0⁵,¹⁰.0¹⁸,²¹]henicos-2(11)-en-15-yl]-2-methylbutanoic acid