Benzoyleneurea scaffold was used in the synthesis of novel protein geranylgeranyltransferase-I inhibitors.It was used to study the mechanism of inactivation of chymotrypsin and other serine proteases by benzoxazinones. Benzoyleneurea scaffold was used in the synthesis of novel protein geranylgeranyltransferase-I inhibitors.It was used to study the mechanism of inactivation of chymotrypsin and other serine proteases by benzoxazinones.