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MS/MS daughter scans of Compound-1 (m/z 374) synthesized by FilI and the reference compound. (a) Compound-1 with open HSL ring. (b) Compound-1 with closed HSL ring. (c) N-β-ketooctanoyl-HSL (m/z 242) with open HSL ring using ESI-MS analysis. (d) Product ion (m/z 312) produced by Compound-1. (e) N-tetradecanoyl-DL-homoserine lactone (m/z 312). (f) Product ion (m/z 146) produced by Compound-1 showing an ion at m/z 102.
