71774-90-8 Dispiro(furan-3(2H),1'(5'H)-naphthalene-5',2''-oxiran)-4'(4'aH)-one,2-(acetyloxy)-4'a-((acetyloxy)methyl)-5-(3-furanyl)octahydro-3'-hydroxy-2'-methyl-, (1'S,2S,2'S,2''R,3'R,4'aR,5S,8'aR)-