参考文献：Ultrasensitive Near-Infrared Fluorescence-Enhanced Probe for in Vivo Nitroreductase Imaging Yuhao Li, Yun Sun, Jiachang Li, Qianqian Su, Wei Yuan, Yu Dai, Chunmiao Han, Qiuhong Wang, Wei Feng,* and Fuyou Li*，J. Am. Chem. Soc. 2015, 137, 6407−6416，DOI: 10.1021/jacs.5b04097