Chirality in Nature Enantiomers of a chiral molecule Have same physical properties Usually have different biological properties (+)-Limonene (-)-Limonene (in oranges) (in lemons) @2007 Thomson Higher Education The two enantiomers of carvone: 香芹酮 spearmint Caraway(苋蒿，香菜)rye bread Chirality in Nature Enantiomers of a chiral molecule：Have same physical properties； Usually have different biological properties The two enantiomers of carvone: spearmint Caraway(苋蒿，香菜) rye bread * 香芹酮