4.6 Article

Cytotoxic indole alkaloids from Melodinus khasianus and Melodinus tenuicaudatus

Journal

FITOTERAPIA
Volume 128, Issue -, Pages 162-168

Publisher

ELSEVIER SCIENCE BV
DOI: 10.1016/j.fitote.2018.05.015

Keywords

Melodinus khasianus; Melodinus tenuicaudatus; Bisindole alkaloids; Melodinus-type alkaloid; Melodinusines A-D

Funding

  1. National Natural Science Foundation of China [21432010]
  2. Technological leading talent project of Yunnan [2015HA020]
  3. Central Asian Drug Discovery and Development Center of CAS [CAM201402, CAM201302]
  4. Yunnan Applied Basic Research Projects
  5. CASLight of West China Program
  6. Youth Innovation Promotion Association of CAS [2015323]
  7. Young Academic and Technical Leader Raising Foundation of Yunnan Province

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Four new indole alkaloids, melodinusines A-D (1, 2, 6, and 7), along with 26 known indole alkaloids, were isolated from Melodious tenuicaudatus and Melodinus khasianus (Melodinus genus). Among them, 1 and 2 are aspidospermine-aspidospermine-type bisindole alkaloids while 7 is a novel melodinus-type alkaloid. Their structures were established on the basis of comprehensive spectroscopic data analysis and the structure of 7 was further confirmed by single-crystal X-ray diffraction analysis. Their cytotoxic activities against five human cancer cell lines, HL-60, SMMC-7721, A-549, MCF-7, and SW480 were also evaluated.

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