甲基2-(3-氧代丙基)苯甲酸酯

methyl 4-[2-(2-methoxy-2-oxoethyl)phenyl]butanoate

1-(chloromethyl)-2-(3-chloropropyl)benzene

4,5-dihydro-3H-2-benzoxepin-1-one

4,5-dihydro-2-benzoxepine-1,3-dione