Fifteen new aryl formyl ureas containing tetrazolyl have been synthesized. Their structures were confirmed by IR, 1H NMR and elementary analysis. The results of biological activity tests make clear that some target compounds have evident activity on plant growth regulator. Particularly, N-5-tetrazolyl-N'-p-methoxyphenyl formyl urea (2h) and 7V-5-tetrazolyl-.N'-p-bromophenyl formyl urea (2j) have good auxins activity, 2h, 2j and N-5-tetrazolyl-N'-p-methylphenyl formyl urea (2m) have excellent activity of cytokinin.

Key words: TETRAZOLE P;UREA;IR;1HNMR;BIOLOGICAL ACTIVITY;PLANT GROWTH REGULATORS, CYTOKININ