T. Hua, K. Vemuri, S.P. Nikas, R.B. Laprarie, Y. Wu, L. Qu, M. Pu, A. Korde, S. Jiang, J.H. Ho, G.W. Han, K. Ding, X. Li, H. Liu, M.A. Hanson, S. Zhao, L.M. Bohn, A. Makriyannis, R.C. Stevens, Z.J. Liu “Crystal structure of agonist-bound cannabinoid receptor CB1” Nature 547, 468-471 (2017). PMC5793864.