英文名称:gamma-Methyl-alpha-trifluoromethyl-gamma-butyrolactone; alpha-(Trifluoromethyl)-gamma-valerolactone,mixture of cis and trans; 5-methyl-3-(trifluoromethyl)dihydrofuran-2(3H)-one; (3S,5R)-5-methyl-3-(trifluoromethyl)dihydrofuran-2(3H)-one; (3S,5S)-5-methyl-3-(trifluoromethyl)dihydrofuran-2(3H)-one; (3R,5R)-5-me