CC1=CC(=O)C(C(C1C(=O)O)C2=CC=C(C=C2)Cl)C(=O)O
InChI=1S/C15H13ClO5/c1-7-6-10(17)13(15(20)21)12(11(7)14(18)19)8-2-4-9(16)5-3-8/h2-6,11-13H,1H3,(H,18,19)(H,20,21)
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