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STUDIES ON TETRAHYDROISOQUINOLINES. XII. AN ALTERNATIVE SYNTHESIS OF ( +OU- )-BRACTEOLINE, ( +OU- )-ISOBOLDINE, ( +OU- )-N-METHYLLAUROTETANINE, AND THEIR RELATED APORPHINES.HARA H; HOSHINO O; UMEZANA B et al.1976; CHEM. PHARM. BULL.; JAP.; DA. 1976; VOL. 24; NO 8; PP. 1921-1925; BIBL. 16 REF.Article