93361-64-9 Pentaleno(1,6a-c)pyran-5-carboxylic acid, 1,2,4,4a,6a,7-hexahydro-1-hydroxy-1-(hydroxymethyl)-7,8-dimethyl-2-oxo-, (1R-(1alpha,4aalpha,6abeta,7alpha,9aS*))- Pentalenolactone O