82225-39-6 Spiro(furan-3(2H),1'(2'H)-naphthalene)-2,6'(5'H)-dione,4'-(acetyloxy)-4'a-((acetyloxy)methyl)-5'-(chloromethyl)-5-(3-furanyl)octahydro-5'-hydroxy-2'-methyl-, (1'R,2'R,4'S,4'aR,5S,5'S,8'aS)-