COMMUNICATIONS
CDCl3): d=141.4, 139.2, 138.0, 135.9, 129.8, 129.1, 127.1,
127.0, 126.6, 123.5, 121.2, 120.9, 119.9, 119.87, 109.7, 109.3,
22.1, 21.4; MS (EI): m/z (%)=271.1 (100), 254.1, 241.0,
127.2, 77.0; HR-MS: m/z=272.14311, calcd. for C20H18N
[M+H]+: 272.14338.
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Acknowledgements
This work was supported by the National Natural Science
Foundation of China (21372187, 21502160, 21572194), and
the Hunan Provincial Innovative Foundation for Postgradu-
ates (CX2016B260).
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