The reaction between methyl (R)-2-(2-chloro-phen-yl)-2-hy-droxy-acetate and 3-nitro-benzene-sulfonyl chloride gave the title compound, C(15)H(12)ClNO(7)S, which is a promising inter-mediate for the synthesis of Clopidrogel, an anti-platelet drug used in the prevention of strokes and heart attacks. In the crystal, mol-ecules are linked through C-H⋯O interactions, and there is also a short Cl⋯O contact present [Cl⋯O = 3.018 (2) Å].