94
Yun et al.
1
mp. >320ꢀC (decomp.). The NMR spectral data were identical with those reported8: H
NMR (800 MHz, DMSO-d6) d 13.16 (s, 1 H), 10.76 (bs, 1H), 7.37 (s, 1H), 6.85 (s, 1H),
6.31 (d, 1H, J D 2.1 Hz), 6.14 (d, 1H, J D 2.1 Hz); 13C NMR (800 MHz, DMSO-d6) d
178.9, 164.7, 162.6, 157.3, 154.0, 150.9, 143.7, 111.8, 108.0, 102.6, 101.6, 97.7, 93.6;
LR-MS (FABC) m/z 261 (MCHC); HR-MS (FABC) calcd for C13H9O6 (MCHC)
261.0394; found: 261.0399.
Acknowledgments
This work was supported by a National Research Foundation of Korea (NRF) grant,
funded by the Korea government (MSIP) (No. 2017R1C1B1001826).
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