[Studies on chemical constituents from roots of Pterospermum heterophyllum].
OBJECTIVE
To study the chemical constituents from the roots of Pterospermum heterophyllum.


METHODS
The chemical constituents of P. heterophyllum were isolated and purified by silica gel and sephadex LH-20 column chromatography. Their structures were identified on the basis of spectroscopic data and physicochemical properties.


RESULTS
Nine compounds were isolated and identified as taraxerol (1), betulin (2), betulinic acid (3), sumaresinolic acid (4), 2-methoxy-5-hydroxy-1, 4-naphthoquinone (5), 5, 7-dihydroxy-6, 8-dimethylchromone (6), alpha-monpalmitin (7), palmitic acid (8), beta-sitosterol (9).


CONCLUSIONS
Compounds 2-7 were isolated from this genus for the first time.
Shi
Yan
Y
Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China.
Li
Shuai
S
Li
Hong-yu
HY
Cui
Bao-song
BS
Yuan
Yi
Y
D002845:Chromatography; D019660:Malvaceae / Q000737:chemistry*; D009285:Naphthoquinones / Q000737:chemistry; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry; D019308:Palmitic Acid / Q000737:chemistry; D053978:Pentacyclic Triterpenes; D018517:Plant Roots / Q000737:chemistry*; D012855:Sitosterols / Q000737:chemistry; D014315:Triterpenes / Q000737:chemistry; D000094062:Betulinic Acid
D009285:Naphthoquinones; D053978:Pentacyclic Triterpenes; D012855:Sitosterols; D014315:Triterpenes; D019308:Palmitic Acid; C025473:gamma-sitosterol; D009828:Oleanolic Acid; C002503:betulin; C005802:taraxerol; D000094062:Betulinic Acid