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(2004)Methanesulfonic acid (2R,3S)-3-methoxy-1-(4-methoxy-phenyl)-4-oxo-azetidin-2-ylmethyl ester
(2S,3S)-3-Methoxy-1-(4-methoxy-phenyl)-4-oxo-azetidine-2-carboxylic acid
(3S,4R)-4-Hydroxymethyl-3-methoxy-1-(4-methoxy-phenyl)-azetidin-2-one
(3S,4S)-4-(2-Hydroxy-acetyl)-3-methoxy-1-(4-methoxy-phenyl)-azetidin-2-one