[Three cyclic dipeptides from the root of Psammosilene tunicoides].
OBJECTIVE
[corrected] To study the cyclic peptides from Psammosilene tunicoides.


METHODS
The constituents were separated and purified with chromatographic methods, identified by NMR, MS, UV and IR.


RESULTS
Three cyclic dipeptides: cyclo(-Pro-Val-) (1), cyclo(-Pro-Ala-) (2) and cyclo(-Pro-Pro-) (3), were isolated and identified.


CONCLUSIONS
Compound 1 and 2 are new natural products, compound 3 was isolated for the first time from Psammosilene tunicoides.
Ding
Zhong-tao
ZT
Department of Chemistry, Yunnan University, Kunming 650091, Yunnan, China. ztdng@ynu.edu.cn
Bao
Zhi-juan
ZJ
Yang
Xue-qiong
XQ
Jiang
Ming
M
D029748:Caryophyllaceae / Q000737:chemistry*; D004151:Dipeptides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry / Q000302:isolation & purification*; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*
D004151:Dipeptides; D010456:Peptides, Cyclic; C448039:prolyl-proline; C034446:prolylvaline