Structural chemical characterization of SCI papers refers to the process of detailed structural description, composition analysis and property evaluation of chemical substances involved in SCI papers. This characterization method can use various chemical techniques and instruments, such as mass spectrometry, nuclear magnetic resonance, infrared spectroscopy, etc., to obtain structural information and characteristic data about chemical substances. Through the analysis and interpretation of these data, it can be proved that the scientific viewpoints and experimental results put forward in SCI papers are scientific and reliable. The purpose of structural chemical characterization of SCI papers is to ensure the accuracy and repeatability of the research results and provide reference and basis for further research by other researchers.