The style of Zea mays L. is a kind of traditional Chinese medicine, which has many biological activities and has been used in folk medicine. To study its bioactive constituents, the style of Zea mays L. was subjected to phytochemical investigation resulting in the isolation of a novel flavone (1) and two urea glycosides (2 and 3). Their structures were determined by various spectroscopic data, including ¹H NMR, ¹³C NMR, HSQC, HMBC, ¹H-¹H COSY and ESI-MS. Compound 1 was a novel flavone and elucidated as 6-acetyl-luteolin. Compounds 2 and 3 were two novel natural products and identified as rhamnosyl urea and 1,3-dirhamnosyl urea respectively. The ¹H NMR and ¹³C NMR spectra data of compounds 2 and 3 were assigned for the first time.

Key words: the style of Zea mays L., 6-acetyl-luteolin, rhamnosyl urea, 1,3-dirhamnosyl urea