Biotransformation of Patchouli Alcohol by Cladosporium cladosporioides and the Anti-Influenza Virus Activities of Biotransformation Products

J Agric Food Chem. 2024 Apr 10;72(14):7991-8005. doi: 10.1021/acs.jafc.3c09753. Epub 2024 Mar 28.

Abstract

The biotransformation of patchouli alcohol by Cladosporium cladosporioides afforded 31 products, including 21 new ones (1-3, 5, 6, 8-14, and 17-25). Their structures were determined by extensive spectroscopic data analysis (1H and 13C NMR, HSQC, HMBC, 1H-1H COSY, ROESY, and HRESIMS), and the absolute configuration of compounds 1, 2, 8, 9, and 17 was determined by single-crystal X-ray diffraction using Cu Kα radiation. Structurally, compounds 21-24 were patchoulol-type norsesquiterpenoids without Me-12. Among them, a Δ3(4) double bond existed in compounds 21 and 22; a three-membered ring was formed between C-4, C-5, and C-6 in compound 23; an epoxy moiety appeared between C-3 and C-4 in compound 24. Furthermore, the biotransformation products 9, 10, 12, and 25 showed potent anti-influenza virus activity with EC50 values of 2.11, 7.94, 20.87, and 3.45 μM, respectively.

Keywords: Cladosporium cladosporioides; anti-influenza virus; biotransformation; patchouli alcohol.

MeSH terms

  • Biotransformation
  • Cladosporium / chemistry
  • Sesquiterpenes* / chemistry

Substances

  • patchouli alcohol
  • Sesquiterpenes

Supplementary concepts

  • Cladosporium cladosporioides