InChI=1/C15H14O4S/c1-2-19-15(16)12-7-6-10-14(11-12)20(17,18)13-8-4-3-5-9-13/h3-11H,2H2,1H benzoic acid, 3-(phenylsulfonyl)-, ethyl ester ethyl 3-(phenylsulfonyl)benzoate