L-焦谷氨酸

(2R,5S)-2-trichloromethyl-1-aza-3-oxabicyclo[3.3.0]octane-4,8-dione

(S)(-)-N,O-bis(p-toluenesulphonyl)-2-hydroxymethyl pyrrolidine

2-(R,S)-5-(S)-[3.3.0]-1-aza-2-thia-3-oxabicyclooctane-2-oxide

四氢吡咯