Structure Revision of Four Acylphloroglucinols Isolated from the Leaves of Syzygium polyanthum

Abstract

The structures of four 1-acyl-2,3,5-trihydroxybenzene derivatives (1–4) that inhibit the enzyme protein tyrosine phosphatase 1B, previously reported from the leaves of Syzygium polyanthum, have been revised based upon reinterpretation of NMR spectroscopic data. The corrected structures are all 1-acylphloroglucinol derivatives (5–8).