- Prodrugs of scutellarin: Ethyl, benzyl and N,N-diethylglycolamide ester synthesis, physicochemical properties, intestinal metabolism and oral bioavailability in the rats. Cao, F., Guo, J.X., Ping, Q.N., Liao, Z.G. European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences (2006)