remark:λex:646 nm, λmax:662 nm
1H NMR (400 MHz, DMSO-d6) δ 8.46 (d, J = 5.2 Hz, 4H), 8.24 (t, J = 8.0 Hz, 2H),
8.06 (q, J = 9.2 Hz, 4H), 7.82 –7.59 (m, 7H), 7.53 (d, J = 8.0 Hz, 1H), 7.44 (d, J = 7.9
Hz, 3H), 7.26 –7.16 (m, 3H), 6.95 (s, 2H), 6.59 (s, 0H), 6.31 (dd, J = 31.0, 13.7 Hz,
2H), 4.19 (s, 2H), 3.74 (s, 7H), 3.69 (s, 2H), 3.65 (s, 3H), 3.16 (s, 1H), 2.33 (s, 1H),
1.94 (d, J = 4.4 Hz, 13H), 1.70 (s, 1H), 1.50 (s, 1H), 1.28 (d, J = 33.8 Hz, 1H). HRMS
(ESI-TOF): [M+H]+calcd m/z for C74H78N9O2,1125.50; found, 1125.63.
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