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an unsaturated acid (C4H6O2) used to make resins and plastics
an unsaturated acid (C4H6O2) used to make resins and plastics
an unsaturated acid (C4H6O2) used to make resins and plastics
an unsaturated acid (C4H6O2) used to make resins and plastics
an unsaturated acid (C4H6O2) used to make resins and plastics