如何更正未定义的引用？我多次点击 BibTex 选项让 Latex 自动识别新引用，但这不起作用。
\documentclass[12pt,a4paper]{report}
\usepackage{natbib}
\begin{document}
\section{Introduction}
\label{sec:intro}
\subsection{A}
Text with \cite{hatcher2008}
\bibliographystyle{plain}
\bibliography{bibfile}
\end{document}
附录：以下是该文件的摘录.bib：
@article{hatcher2008curcumin}
title={Curcumin: from ancient medicine to current clinical trials},
author={Hatcher, H. and Planalp, R. and Cho, J. and Torti, FM and Torti, SV},
journal={Cellular and Molecular Life Sciences},
volume={65},
number={11},
pages={1631--1652},
year={2008},
publisher={Springer}