202873 -OEChem-02060822402D 0 0 0 0 0 0 0 0 0999 V2000 M END > 202873 > 3 > ChemIDplus > O00650000 > O00650000 > O00650000 Oestrogen - progestin combinations > O00650000 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=O00650000 $$$$