Schulzeines A-C, New α-Glucosidase Inhibitors from the Marine Sponge Penares schulzei

Kentaro Takada, Taisuke Uehara, Yoichi Nakao, Shigeki Matsunaga, Rob W.M. Van Soest, Nobuhiro Fusetani*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

104 Citations (Scopus)


Three new α-glucosidase inhibitors, schulzeines A-C (1-3), were isolated from the marine sponge Penares schulzei. Their structures were elucidated by spectral analysis and chemical degradations to be the isoquinoline alkaloids, encompassing two amino acids, and C28 fatty acid, the last of which was sulfated. Absolute stereochemistry of schulzeines was determined by application of the modified Mosher analysis to fragments obtained by chemical degradation. Schulzeines A-C inhibit α-glucosidase with IC50 values of 48-170 nM.

Original languageEnglish
Pages (from-to)187-193
Number of pages7
JournalJournal of the American Chemical Society
Issue number1
Publication statusPublished - 2004 Jan 14
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry
  • Biochemistry
  • Colloid and Surface Chemistry


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