kw.\*:("BENZO (1,2-B:5,4-B) DIPYRANNEDIONE-2,8(TETRAHYDRO-2,3,4,8)")
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BENZODIPYRANS. VI. PECHMANN CONDENSATION OF SOME 7-HYDROXY-3,4-DIHYDROCOUMARINS & SYNTHESIS OF LINEAR & ANGULAR COUMARIN-ALPHA -PYRONES.MUJUMDAR AS; USGAONKAR RN.1977; INDIAN J. CHEM.; INDIA; DA. 1977; VOL. 15; NO 6; PP. 520-522; BIBL. 8 REF.Article
