(8S-cis)-8,9-Dihydro-8-(1-methyl-1-(3-methyl-1-oxobutoxy)ethyl)-2-oxo-2H-furo(2,3-h)-1-benzopyran-9-yl 3-methylbutanoate 1892-56-4 Athamantin Butanoic acid, 3-methyl-, 8,9-dihydro-8-(1-methyl-1-(3-methyl-1-oxobutoxy)ethyl)-2-oxo-2H-furo(2,3-h)-1-benzopyran-9-yl ester, (8S-cis)-