Longicalycinin A, a new cytotoxic cyclic peptide from Dianthus superbus var. longicalycinus (MAXIM.) WILL |
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Authors: | Hsieh Pei-Wen Chang Fang-Rong Wu Ching-Chung Li Chien-Ming Wu Kuen-Yuh Chen Su-Li Yen Hsin-Fu Wu Yang-Chang |
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Affiliation: | Graduate Institute of Natural Products, Kaohsiung Medical University, Taiwan. |
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Abstract: | A new cyclic peptide, longicalycinin A (1), and six known compounds, vaccaroside A, dianoside A, dianoside G, 3-(4-hydroxy-3-methoxy-phenyl)propionic acid methyl ester, p-hydroxybenzoic acid, and p-hydroxybenzaldehyde were isolated from the MeOH extract of Dianthus superbus var. longicalycinus. The amino acid sequences of 1 was elucidated as cyclo(Gly(1)-Phe(2)-Tyr(3)-Pro(4)-Phe(5)-) on the basis of ESI tandem mass fragmentation analysis, chemical evidence, and extensive 2D NMR methods. Furthermore, compound 1 showed cytotoxicity to Hep G2 cancer cell line. |
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