[A-ring formylated flavonoids and oxoaporphinoid alkaloid from Dasymaschalon rostratum Merr. et Chun].
OBJECTIVE
To study the chemical components in the stem of Dasymaschalon rostratum.


METHODS
The components were extracted with solvent, separated and purified with chromatographic methods, identified by NMR, MS, UV, IR and physicol-chemical constants.


RESULTS
Three A-ring-formylated flavonoids and one oxoaporphinnoid aikaloid were isolated and identified as lawinal, unonal, isounonal and 7-oxodehydroasimilobine.


CONCLUSIONS
All the four compounds were isolated for the first time from the genus Dasymaschalon. According to all the phytochemistry papers on Annonaceae, A-ring formylated flavonoids in this family were isolated from the genus Desmos for the first time. Thus, it is an interesting discovery in chemotaxonomy which reveals the close relationship between the two genera Desmos and Dasymaschalon.
Zhou
L D
LD
Institute of Medicinal Plants, CAMS & PUMC, Beijing 100094, China.
Yu
J G
JG
Guo
J
J
Yang
S L
SL
D029061:Annonaceae / Q000737:chemistry* / Q000145:classification; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry* / Q000145:classification; D011166:Porphyrins / Q000737:chemistry / Q000302:isolation & purification
C471769:7-oxodehydroasimilobine; D004365:Drugs, Chinese Herbal; D005419:Flavonoids; D011166:Porphyrins; C061398:lawinal; C061424:isounonal; C471768:unonal