(3R,4R,5S)-4-acetamido-5-(2,3-bis(tert-butoxycarbonyl)guanidino)-3-propoxycyclohex-1-ene-1-carboxylic acid

(3R,4R,5S)-5-Azido-4-methanesulfonylamino-3-propoxy-cyclohex-1-enecarboxylic acid methyl ester

(3R,4R,5S)-5-Azido-4-propionylamino-3-propoxy-cyclohex-1-enecarboxylic acid methyl ester

3-对香豆酰基奎宁酸

1-O-Methoxycarbonylacetonquinid