(3-Chloro-2-hydroxyphenyl)(2,3,4-trichloro-5-hydroxyphenyl)phenylmethanesulfonic acid C??? ??, ??, ??

(3-Chloro-2-hydroxyphenyl)(2,3,4-trichloro-5-hydroxyphenyl)phenylmethanesulfonic acid ?? ?? ? ???

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(3-Chloro-2-hydroxyphenyl)(2,3,4-trichloro-5-hydroxyphenyl)phenylmethanesulfonic acid ?? ??