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김신규(Sin Kyu Kim),김동현(Dong Hyun Kim),정경희(Kyung Hee Chung),황순호(Soon Ho Hwang),김재현(Jae Hyun Kim) 대한약학회 1994 약학회지 Vol.38 No.1
Irradiation of the berberinephenolbetaine [1] effected valence tautamerization to give 8,14-cycloberbine[2], which was converted to the spirobenzylisoquinolines by regioselective C-N bond cleavage A variety of ring systems such as compounds [4], [5] and [6] were indroduced by the structural modification of berberinephenolbetaine.