Lai, Yu-Chen; Luo, Chin-Hung; Chou, Hsin-Chun; Yang, Cheng-Jhang; Lu, Le; Chen, Chien-Sheng Tetrahedron Letters, 2016, vol. 57, # 23 p. 2474 - 2477 doi: 10.1016/j.tetlet.2016.04.064