Synonyms: 2(3H)-Furanone,3-[2-[2,2-dimethyl-6-methylene-3-[2-(tetrahydro-1-hydroxy-4,6,6-trimethylspiro[2,5-dioxabicyclo[2.2.2]octane-3,2'-[2H]pyran]-5'-yl)ethyl]cyclohexyl]ethylidene]dihydro-,[1S-[1a,3b[R*[1R*(E),3S*]],4b]]-;Spiro[2,5-dioxabicyclo[2.2.2]octane-3,2'-[2H]pyran], 2(3H)-furanone deriv.;Saponaceolide B