Opium alkaloids. XIII. Isolation of 16-hydroxythebaine

Opium alkaloids. XIII. Isolation of 16-hydroxythebaine Opium Alkaloids VII. Isolation of a New Benzylisoquinoline Alkaloid. Synthesis and NMR Studies of Papaveroline Trimethyl Ethers A new rearrangement product of thebaine, isolated from Papaver bracteatum Lindl. Structural assignment of thebaine N-oxides The alkaloidal constituents of Papaver bracteatum arya II Opium Alkaloids VI Alkaloids of Oxytropis. I Neodihydrothebaine and bractazonine, two dibenz[d,f]azonine alkaloids of Papaver bracteatum Alkaloids ofPapaver orientale Somniferine, a novel dimeric opium alkaloid Constituents of Papaver bracteatum: O-methyl-α-thebaol and 10-n-nonacosanol. Lanthanide-induced chemical shifts in 1H NMR and 13C NMR