51918-98-0 Mallotucin A Spiro(furan-3(2H),6'-(6H)naphtho(1,8-bc)furan)-2,2'(4'H)-dione, 5-(3-furanyl)-3',4,5,5',5'a,7',8',8'a-octahydro-7'-methyl-, (3R,5S,5'aS,7'R,8'aS)- Spiro(furan-3(2H),6'-(6H)naphtho(1,8-bc)furan)-2,2'(4'H)-dione, 5-(3-furanyl)-3',4,5,5',5'a,7',8',8'a-octahydro-7'-methyl-, (5'aS-(5'aalpha,6'beta(R*),7'beta,8'aalpha))- Teucvin