二苯甲酮肟

2-phenyl-4-methyl-5-methoxyoxazole

methyl 1-methoxy-5-phenyl-2,3,7-trioxabicyclo(2.2.1)hept-5-ene-6-carboxylate

二甲基氧代丙二酸酯

(Phenylcarbonylmethylene)triphenylphosphorane