79859-42-0 BRN 5778781 NSC 639447 Spiro(cyclohexane-1,4'(3'H)-(1H-7,9a)methanocyclohepta(c)pyran)-2-carboxaldehyde, 3-((acetyloxy)methyl)hexahydro-5'-hydroxy-3-methyl-8'-methylene-1',9'-dioxo-, (4'R-(4'-alpha(2R*,3R*),4'a-alpha,5'-beta,7'-beta,9'a-beta))- Trichorabdal B