4-(2-allyl-phenyl)-1-(4-methoxy-phenyl)-3-triisopropylsilanyloxy-azetidin-2-one

4-deacetyl-4-acryloyl-10-deacetylbaccatin III

(3R,4S)-1-benzoyl-3-O-triisopropylsilyloxy-4-(o-allylphenyl)azetidin-2-one

4-(2-bromo-phenyl)-3-hydroxy-1-(4-methoxy-phenyl)-azetidin-2-one

4-(2-allyl-phenyl)-3-triisopropylsilanyloxy-azetidin-2-one