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Two New Cycloheptapeptides from Psammosilene tunicoides
Author(s) -
Tian JunMian,
Gao JinMing,
Lu Lu,
He YiRen,
Shen YunHeng,
Li HuiLiang,
Su Juan,
Liu RunHui,
Shan Lei,
Zhang WeiDong
Publication year - 2012
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.201100467
Subject(s) - chemistry , sponge , residue (chemistry) , stereochemistry , two dimensional nuclear magnetic resonance spectroscopy , bacteria , cyclic peptide , organic chemistry , botany , peptide , biochemistry , genetics , biology
Two new cycloheptapeptides, tunicyclins F and G, were isolated from the roots of Psammosilene tunicoides. Their chemical structures were elucidated by extensive analysis of 1D‐ and 2D‐NMR, as well as HR‐ESI‐MS data. Tunicyclin G contains an unusual α , β ‐dehydrotryptophan (Δ Z ‐Trp) residue, which mainly occurs in the cyclic peptides from marine sponge and bacteria.
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