Abstract

• The present research paper describes the first isolation of 7-methoxy-6-(1'-methyl-4'-oxo-3', 6'-dioxabicyclo[3.1.0]hexan-2'-yl)-2H-chromen-2-one (Microzelanicum, C15H12O6) from the plant of Clausena heptaphylla (Roxb.) Wight & Arn which belongs to the family Rutaceae. The structure of isolated pure compound was confirmed by spectroscopic data measurements ( 1H- and 13C-NMR, 2D NMR, and MS). The structure of isolated pure compound, Microzelanicum (C15H12O6), is shown below.