(untitled) - Cao, M.-M; Zhang, Y; Li, X.-H; Peng, Z.-G; Jiang, J.-D; Gu, Y.-C; Di, Y.-T; Li, X.-N; Chen, D.-Z; Xia, C.-F; He, H.-P; Li, S.-L; Hao, X.-J (J. Org. Chem., 2014)