19 March 2019 3 4K Report

I have synthesised a benzimidazole derivative from histidine and o phenylenediamine. product was precipitated with acetone. Theoretical mass expected is 227 Da, But I am getting the mass of 236 and 273 Da as the major relative abundance peaks in LCMS why?

Molecular ion peak is showing a mass of 309 Da why?

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