754741 -OEChem-02060822472D 1 0 0 0 0 0 0 0 0999 V2000 3.5833 -2.5917 0.0000 Er 0 0 0 0 0 0 0 0 0 0 0 0 M ISO 1 1 161 M END > 0 > 0 > 754741 > 3 > ChemIDplus > 014967670 > 14967-67-0 161Er Erbium, isotope of mass 161 Erbium-161 > 14967-67-0 > 014967670 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=014967670 > 177526 1 $$$$