82225-40-9 Spiro(furan-3(2H),1'(2'H)-naphthalene)-2,4',6'(3'H,5'H)-trione,4'a-((acetyloxy)methyl)-5'-(chloromethyl)-5-(3-furanyl)hexahydro-5'-hydroxy-2'-methyl-, (1'R,2'R,4'aR,5S,5'S,8'aS)-