4-(Methylsulphonyloxy)phenylacetic acid

4-[(Methylsulfonyl)oxy]-benzeneacetic acid

{4-[(methylsulfonyl)oxy]phenyl}acetic acid

2-[4-(Methanesulfonyloxy)phenyl]acetic acid

1-(Carboxymethyl)-4-[(methylsulphonyl)oxy]benzene