4-((2R,3R)-3-Benzyl-4-oxo-azetidin-2-yloxy)-benzoic acid benzhydryl ester

5-(4-methoxyphenyl)-2,2,4-triphenyl-1,3-oxathiol

diphenylmethyl N-methoxycarbonyl-6-oxopipecolate

1-methoxy-6,6-diphenylbicyclo<3.1.0>hexan-3-one