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Article

Lee, D.-U. and Mayer, K.K. and Wiegrebe, Wolfgang (1993) Different EI-MS Fragmentations of the (E)- and (Z)-Enol Lactones Derived from α-Narcotine. Archiv der Pharmazie 326, pp. 251-252.

Lee, D.-U. and Iwasa, K. and Kamigauchi, M. and Takao, N. and Wiegrebe, Wolfgang (1991) Degradation of some Phthalideisoquinolines with Ethyl Chloroformate-Stereochemical Aspects. Chemical & Pharmaceutical Bulletin 39 (8), pp. 1944-1948.

Lee, D.-U. and Wiegrebe, Wolfgang (1991) Optically Active Intermediate from Degradation of (-)-Laudanosine, a Benzylisoquinoline Alkaloid, with Ethyl Chloroformate. Bulletin of the Korean Chemical Society 12 (4), p. 373.

Angerer, S. von and Eibler, E. and Lee, D.-U. and Wiegrebe, Wolfgang (1989) Degradation of 1-Benzyl-1,2,3,4-tetrahydroisoquinolines (Laudanosine) with Ethyl chloroformate: Gedamer's Intermediate. Scientia Pharmaceutica (Sci. Pharm.) 57, pp. 1-6.

Lee, D.-U. and Mayer, K.K. and Wiegrebe, Wolfgang (1988) Mass Spectrometric Investigations of Phenylacetic Acid Derivatives, III: Fragmentation of meta- and para-substituted Phenylacetamides after Electron Impact. Archiv der Pharmazie 321, pp. 315-320.

Lee, D.-U. and Mayer, K.K. and Wiegrebe, Wolfgang (1988) Massenspektrometrische Untersuchungen an Derivaten der Phenylessigsäure, 1. Mitt.: Verlust ortho-ständiger Substituenten aus Phenylacetamid-Ionen. Archiv der Pharmazie 321, pp. 265-272.

Lee, D.-U. and Mayer, K.K. and Wiegrebe, Wolfgang (1988) Massenspektrometrische Untersuchungen an Derivaten der Phenylessigsäure, 2. Mitt.: Ortho-Effekte bei ionisierten Phenylessigsäureestern. Archiv der Pharmazie 321, pp. 303-305.

Kim, W.-J. and Lee, D.-U. and Wiegrebe, Wolfgang (1984) Cleavage of 1-Benzyltetrahydroisoquinolines to Secondary Amines via Urethanes. Archiv der Pharmazie 317 (5), pp. 438-442.

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