Abstract: Three methoxyflavone compounds: 5, 7, 3′, 4′-tetramethoxyflavone (compound 1）, 5, 7, 3′, 4′, 5′-pentamethoxyflavone (compound 2) and 5,６, 7, 3′,4′,5′-hexamethoxyflavone (compound 3) were separated from the leaves of Murraya exotica L, among which compound 2was reported for the first time. ¹H and ¹³C NMR spectra (including ¹H-¹H COSY, HMQC and HMBC) of the compounds were acquired and assigned. The structures of the compounds were elucidated. The position of the methoxyl group in each of the compounds was determined.

Key words: NMR, chemical shift assignment, Murraya exotical L, methoxyflavone