744860 -OEChem-02060822472D 1 0 0 0 0 0 0 0 0999 V2000 4.0396 1.8029 0.0000 Pr 4 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 145 M END > 0 > 0 > 744860 > 3 > ChemIDplus > 015765238 > 145Pr 15765-23-8 Praseodymium, isotope of mass 145 Praseodymium-145 > 15765-23-8 > 015765238 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=015765238 > 167417 1 $$$$