p. 513 - 516
(1986)p. 3491 - 3492
(2007/10/02)p. 1671 - 1679
(2007/10/02)(2008/06/13)
2-[(R)-2-(2-Carbamoyloxy-acetylsulfanyl)-3-((R)-1-hydroxy-ethyl)-4-oxo-azetidin-1-yl]-3-methyl-but-2-enoic acid acetoxymethyl ester
2-{(2R,3S)-2-(3-Hydroxy-prop-1-ene-2-sulfinyl)-4-oxo-3-[(R)-1-(2,2,2-trichloro-ethoxycarbonyloxy)-ethyl]-azetidin-1-yl}-3-methyl-but-2-enoic acid acetoxymethyl ester
acetoxymethyl oxalic acid
Chloro-oxo-acetic acid acetoxymethyl ester
acetoxymethyl glycolate