Collect. Czech. Chem. Commun.
1970, 35, 1440-1455
https://doi.org/10.1135/cccc19701440
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
This article is part of serial Isolation and chemistry of the alkaloids from some plants of the genus Papaver.