Collect. Czech. Chem. Commun. 1970, 35, 1440-1455

Isolation and chemistry of the alkaloids from some plants of the genus Papaver. XLVIII. Studies in exhaustive methylation of tetrahydroprotoberberine alkaloids and the structure of the alkaloids PO-4, PO-5, orientalidine and mecambridine

V. Šimánek, V. Preininger, P. Sedmera and F. Šantavý

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