114118-91-1 2,4-Pyrrolidinedione, 3-(6-(1,4-dimethylspiro(2,9-dioxabicyclo(3.3.1)non-6-ene-8,2'-oxiran)-3-yl)-1-hydroxy-4-methyl-2,4-heptadienylidene)-, (1alpha,3alpha(1E,2E,4E,6R*),4beta,5alpha,8alpha)-(-)- Tirandalydigin