Bioactivity of chifal compounds such as ibuprofen is determined by their structure. For ibuprofen,there is a chiral β-carbon atom in the molecule.so a pair of enantiomers((R)-enantiomer and (S)-enantiomer) exists.The bioactivity of ibuprofen is mainly due to the (S)-enantiomer, though (R)-enantiomer has side-effects and low bioactivity. Recently, utilization of lipase in the resolution of ibuprofen receives greater interest because of the mild reaction condition, high enantioselectivity, less side reactions...