Problem:
Pr is recognized as Propyl instead of Praseodymium in Signals Notebook
Solution:
This is a designed behavior as Pr is used for Propyl not Praseodymium.
Please note that you cannot just type "Pr" at atom positions. It is important that you actually define that the atoms are Praseodymium by using the Periodic Table tool (or by using "141" superscript in front of "Pr") when drawing an atom label in ChemDraw.
You can add molecules containing Praseodymium into Signals Notebook from ChemDraw by any of the following ways:
a. Use ChemDraw round trip editing (i.e. click on "Edit in ChemDraw Desktop" green button at the top right corner of your Chemical Drawing in Signals Notebook).
b. Paste correctly drawn structure from ChemDraw.
c. Paste a MOL/InChI/SMILES.