label: (+)(-)-(3alpha,4alpha,6alpha)-4-(tert-butyldimethylsiloxy)-3,4,5,6-tetrahydro-6-methyl-3-(2-oxopropyl)-2H-pyran-2-one
label_lc: (+)(-)-(3alpha,4alpha,6alpha)-4-(tert-butyldimethylsiloxy)-3,4,5,6-tetrahydro-6-methyl-3-(2-oxopropyl)-2h-pyran-2-one