3743703 -OEChem-02060822572D 0 0 0 0 0 0 0 0 0999 V2000 M END > 3743703 > 2 > ChemIDplus > 052978640 > 4,5-Didehydro-5,6-dihydroretinoic acid 52978-64-0 Retinoic acid, 4,5-didehydro-5,6-dihydro- alpha-Retinoic acid > 52978-64-0 > 052978640 > http://chem.sis.nlm.nih.gov/chemidplus/ > http://chem.sis.nlm.nih.gov/chemidplus/direct.jsp?result=advanced®no=052978640 $$$$