- Glutamic acid analogues as potent dipeptidyl peptidase IV and 8 inhibitors. Lu, I.L., Lee, S.J., Tsu, H., Wu, S.Y., Kao, K.H., Chien, C.H., Chang, Y.Y., Chen, Y.S., Cheng, J.H., Chang, C.N., Chen, T.W., Chang, S.P., Chen, X., Jiaang, W.T. Bioorg. Med. Chem. Lett. (2005)