Showing structure for (1'r,2r,2's,4's,5r,7's,8'r,9's,12's,13'r,15'r,16'r)-15',16'-dihydroxy-5,7',9',13'-tetramethyl-5'-oxaspiro[oxane-2,6'-pentacyclo[10.8.0.0²,⁹.0⁴,⁸.0¹³,¹⁸]icosan]-18'-en-10'-one