@article{19833661, title={13C NMR Signal Assignments of Herqueinone and Its Phenalenone Derivatives}, author={Takayuki Suga and Takamitsu Yoshioka and Toshifumi Hirata and Tadashi Aoki}, journal={Bulletin of the Chemical Society of Japan}, volume={56}, number={12}, pages={3661-3666}, year={1983}, doi={10.1246/bcsj.56.3661} }