754784 -OEChem-02060822472D 1 0 0 0 0 0 0 0 0999 V2000 5.8946 -3.6024 0.0000 Pr 0 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 137 M END > 0 > 0 > 754784 > 3 > ChemIDplus > 015125663 > 137Pr 15125-66-3 Praseodymium, isotope of mass 137 Praseodymium-137 > 15125-66-3 > 015125663 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=015125663 > 177568 1 $$$$