27696-09-9 Cordilin NSC145916 Spiro[7H-cyclohepta[b]furan-7,2'(5'H)-furan]-2,5'(3H)-dione, octahydro-8-hydroxy-6,8-dimethyl-3-methylene-, [3aS-(3a.alpha.,6.beta.,7.alpha.,8.beta.,8a.alpha.)]-