eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-05-06 7 2 889 894 9421 article Rakesh Ranjan 1 Subra Singh 1 Seema Tiwari 2 K.K. Singh 2 Department of Medicinal Chemistry, Institute of Medical Sciences Banaras Hindu University, Varanasi - 221 005 (India) Department of Chemistry, Udai Pratap P.G. College, Varanasi - 221 005 (India). 4, 9-Dihydroxy -3, 8-dimethoxy- benzo [4, 5] furo [3, 2-C] chromen -6- one, 6, 7'-dihydroxy -3- methoxydihydroflavonol, 5,7- dihydroxy -4'-methoxy isoflavone, 7-hydroxy -4'-methoxy isoflavone, 7,3'-dihydroxy -4'-methoxy isoflavone, 4', 5, 7-trihydroxy isoflavone, 2'- hydoxy genistein have been isolated for the first time from the stem bark of Annona squamosa and identified by spectroscopic data. https://www.biotech-asia.org/vol7no2/chemical-investigation-of-annona-squamosa-stem-bark/ Annona squamosa; Spectroscopic data