3-acetyl-3-phenylselenyl-3H-dihydrofuran-2-one

dimethyl (S)-N-(9-phenyl-9H-fluoren-9-yl)aspartate

(2S,3S)-dimethyl 2-N-(9-phenylfluorenyl)-3-ethyl-L-aspartate

(2S,3R)-2-溴-3-(甲氧羰基)戊酸

(2S,3S)-2-bromo-3-ethylbutane-1,4-dioic acid 1-tert-butyl 4-methyl diester