对称二异丙基脲

(R)-4-phenylbut-2-yl-4-bromobenzoate

(R)-4-phenylbut-2-yl-2-phenoxyacetate

(R)-4-phenylbut-2-yl 4-nitrobenzoate

(R)-4-phenylbut-2-yl 2,6-dichlorobenzoate