@article{wang_fu_zhang_li_2007,  title={Synthesis and nuclear magnetic resonance shielding effect of three triazine-linked porphyrin compounds},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000500006},  DOI={10.1590/S0103-50532007000500006},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Wang, Kai and Fu, Shi-Tao and Zhang, Zhi and Li, Zao-Ying},  year={2007},  pages={911–915} }