Synonyms: 3-Penten-1-one,1-(dihydro-4'-hydroxy-1,5,5',5'-tetramethylspiro[bicyclo[3.2.0]heptane-6,2'(3'H)-furan]-7-yl)-5-(2-hydroxy-5-methoxy-3-methylphenyl)-3-methyl-,[1R-[1a,5a,6b(S*),7a(Z)]]-; 3-Penten-1-one,1-[(1R,4'S,5R,2'S,7R)-dihydro-4'-hydroxy-1,5,5',5'-tetramethylspiro[bicyclo[3.2.0]heptane-6,2'(3'H)-furan]-7-yl]-5-(2-hydroxy-5-methoxy-3-methylphenyl)-3-methyl-,(3Z)- (9CI); Spiro[bicyclo[3.2.0]heptane-6,2'(3'H)-furan], 3-penten-1-onederiv.; Isobalearone