754826 -OEChem-02060822472D 1 0 0 0 0 0 0 0 0999 V2000 11.1365 -2.9696 0.0000 Pr -3 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 138 M END > 0 > 0 > 754826 > 3 > ChemIDplus > 015481228 > 138Pr 15481-22-8 Praseodymium, isotope of mass 138 Praseodymium-138 > 15481-22-8 > 015481228 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=015481228 > 177608 1 $$$$