OC1=C2C(OCC2=C(C(=C1C/C=C(/C=C/C=O)\C)OC)C)=O
InChI=1/C17H18O5/c1-10(5-4-8-18)6-7-12-15(19)14-13(9-22-17(14)20)11(2)16(12)21-3/h4-6,8,19H,7,9H2,1-3H3/b5-4+,10-6+
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