Revised assignment of 1H-NMR signals of artemisinic acid.
The correct 1H-NMR assignment of artemisinic acid was achieved through COSY, HETCOR, DEPT, J-resolved, and NOESY techniques. The present experiments supplemented by molecular mechanics calculations could correct some previously misinterpreted signals, notably of H-2s, H-3s, and H-6. The results should be helpful in further work with this important artemisinin-analogue precursor.
Kim
S U
SU
Department of Agricultural Chemistry and The Research Center for New Biomaterials in Agriculture, Seoul National University, Suwon 441-744, Korea.
Han
J
J
Lim
Y H
YH