4a,5-Dihydrocompactin 78366-44-6 Butanoic acid, 2-methyl-, 1,2,3,4,4a,7,8,8a-octahydro-7-methyl-8-(2-(tetrahydro-4-hydroxy-6-oxo-2H-pyran-2-yl)ethyl)-1-naphthalenyl ester, (1S-(1alpha(R*),4aalpha,7beta,8beta(2S*,4S*),8abeta))- Dihydrocompactin