Update app.py

app.py

@@ -474,7 +474,8 @@ if __name__=='__main__':
     Citation1: H. Xu, J. Lin, Q. Liu, Y. Chen, J. Zhang, Y. Yang, M.C. Young, Y. Xu, D. Zhang, F. Mo
     High-throughput discovery of chemical structure-polarity relationships combining automation and machine-learning techniques
     Chem (2022), 3202–3214, 10.1016/j.chempr.2022.08.008\n
-    Citation2: https://huggingface.co/spaces/woshixuhao/Rf_prediction
+    Citation2: https://huggingface.co/spaces/woshixuhao/Rf_prediction\n
+    Business applications require authorization!
     ## Function\n
     Single predict: predict a compound under a given eluent system\n
     Batch predict: Upload a .csv file with multiple conditions to conduct batch prediction\n