6a,7-Dehydro-2-hydroxy-4,5-dioxonoraporphine and Other Alkaloids from Monocyclanthus vignei: ¹³C-nmr Studies on 4,5-Dioxoaporphines

6a,7-Dehydro-2-hydroxy-4,5-dioxonoraporphine and Other Alkaloids from Monocyclanthus vignei: ¹³C-nmr Studies on 4,5-Dioxoaporphines Chemical Studies on the Annonaceae – VI. The Alkaloids of the Stem and Fruit of Monanthotaxis cauliflora¹ Aporphine Alkaloids. II Aporphine alkaloids from Enantia chlorantha Nortenuipine-2'b-N-oxide, a New Bisbenzylisoquinoline Alkaloid from Daphnandra dielsii 13C NMR spectroscopic data of aporphine alkaloids New Aporphine Alkaloids from Phoebe valeriana Nortenuipine-2'b-N-oxide, a New Bisbenzylisoquinoline Alkaloid from Daphnandra dielsii A Spectral Method for the Determination of the Position of a Phenolic Group on Ring A of an Aporphine. Four New Aporphines From Polyalthia acuminata Cytotoxic and antimicrobial aporphine alkaloids fromFissistigma poilanei(Annonaceae) collected in Vietnam