12-epi-Teuscordonin 124817-37-4 Spiro(furan-3(2H),6'-(6H)-naphtho(1,8-bc)furan)-2,2'(4'H)-dione, 5-(3-furanyl)-4,5,5',5'a,7',8',8'a,8'b-octahydro-8'b-(hydroxymethyl)-7'-methyl-, (5'aS-(5'aalpha,6'beta(S*),7'beta,8'abeta,8'bbeta))- Teuscordonin