Saccharoquinoline, a cytotoxic alkaloidal meroterpenoid from marine-derived bacterium Saccharomonospora sp.

Tu Cam Le, Eun Ju Lee, Jihye Lee, Ahreum Hong, Chae Yoon Yim, Inho Yang, Hyukjae Choi, Jungwook Chin, Sung Jin Cho, Jaeyoung Ko, Hayoung Hwang, Sang Jip Nam, William Fenical

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A cytotoxic alkaloidal meroterpenoid, saccharoquinoline (1), has been isolated from the fermentation broth of the marine-derived bacterium Saccharomonospora sp. CNQ-490. The planar structure of 1 was elucidated by 1D, 2D NMR, and MS spectroscopic data analyzes, while the relative configuration of 1 was defined through the interpretation of NOE spectroscopic data. Saccharoquinoline (1) is composed of a drimane-type sesquiterpene unit in combination with an apparent 6,7,8-trihydroxyquinoline-2-carboxylic acid. This combination of biosynthetic pathways was observed for the first time in natural microbial products. Saccharoquinoline (1) was found to have cytotoxicity against the HCT-116 cancer cell line by inducing G1 arrest, which leads to cell growth inhibition.

Original languageEnglish
Article number98
JournalMarine Drugs
Issue number2
StatePublished - 2 Feb 2019

Bibliographical note

Publisher Copyright:
© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (


  • Cytotoxicity
  • Marine natural product
  • Meroterpenoid
  • Saccharomonospora sp


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